Kenta Miyoshi enters this ITF M15 Irvine quarterfinal with a clear edge in recent professional form and ATP ranking proximity, having defeated Lambert Ruland in straight sets while holding the No. 743 spot and a career-high of 535. The Japanese right-hander brings stronger hard-court experience at the ITF level. Rudy Quan, a 20-year-old UCLA standout ranked No. 1219 with a 666 career high, advanced past Emon van Loben Sels in three sets and benefits from local familiarity on California hard courts plus junior pedigree that includes an Indian Wells title. The matchup pits Miyoshi’s consistent baseline game against Quan’s aggressive development trajectory, with limited prior head-to-head data available. Surface conditions and fatigue from the M15 schedule remain key variables for this encounter.
Tóm tắt AI thử nghiệm tham chiếu dữ liệu Polymarket. Đây không phải tư vấn giao dịch và không ảnh hưởng đến cách thị trường này được giải quyết. · Cập nhậtJun 19·10:15 PM
K. Miyoshi-
R. Quan-
$7.69 Vol.
MỚI
This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Men Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to 'Kenta Miyoshi' if Kenta Miyoshi advances against Rudy Quan.
This market will resolve to 'Rudy Quan' if Rudy Quan advances against Kenta Miyoshi.
If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50.
If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances.
If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50.
The primary resolution source will be official information from the International Tennis Federation (ITF). A consensus of credible reporting may also be used.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Miyoshi" if Kenta Miyoshi wins by 2 or more sets than Rudy Quan, based on the final completed score. Otherwise, it will resolve to "Quan."
If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50.
Resolution will be based on official ITF results.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Men Irvine, originally scheduled for June 19, 2026 at 6:15PM ET. This market will resolve to "Yes" if all games and sets required to determine a match winner under governing body or event organizer rules are played to completion through normal play. Otherwise, if the match is not completed for any reason, it will resolve to "No." If a forfeit of any kind occurs, including but not limited to a walkover or retirement, this market will resolve "No." If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to "No." The primary resolution source for this market is the official statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 2 hours after the event's conclusion, a consensus of credible reporting may be used instead.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of sets completed equals or exceeds 3. Otherwise, it will resolve to "Under."
A super tie breaker is considered as one (1) set for total set markets.
If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50.
Resolution will be based on official ITF statistics.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of games completed across all sets equals or exceeds 24. Otherwise, it will resolve to "Under."
All tiebreaks—including any Champions/Super tiebreak—count as one (1) game toward the total.
If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50.
Resolution will be based on official ITF statistics.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to “Miyoshi” if Kenta Miyoshi wins the first set. It will resolve to “Quan” if Rudy Quan wins the first set.
If the match begins but is not completed, and the first set is concluded with a winner determined, this market will resolve based on that completed set. If the first set is not completed for any reason, this market will resolve 50-50.
If the match is canceled (not played at all) or is delayed beyond 7 days from the scheduled date without play beginning, this market will resolve 50-50.
Resolution will be based on official ITF match statistics.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to “Miyoshi” if Kenta Miyoshi wins set 2. It will resolve to “Quan” if Rudy Quan wins set 2.
If the match begins but set 2 is not completed with a winner determined (including the match ending before set 2 is reached), this market will resolve 50-50.
If the match is canceled (not played at all) or is delayed beyond 7 days from the scheduled date without play beginning, this market will resolve 50-50.
Resolution will be based on official ITF match statistics.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of games completed across all sets equals or exceeds 22. Otherwise, it will resolve to "Under."
All tiebreaks—including any Champions/Super tiebreak—count as one (1) game toward the total.
If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50.
Resolution will be based on official ITF statistics.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of games completed across all sets equals or exceeds 23. Otherwise, it will resolve to "Under."
All tiebreaks—including any Champions/Super tiebreak—count as one (1) game toward the total.
If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50.
Resolution will be based on official ITF statistics.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of games completed in set 2 equals or exceeds 9. Otherwise, it will resolve to "Under."
Any tiebreak in set 2 counts as one (1) game toward the total.
If set 2 is not completed for any reason (including the match ending before set 2 is reached), this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50.
Resolution will be based on official ITF results.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of games completed in set 2 equals or exceeds 10. Otherwise, it will resolve to "Under."
Any tiebreak in set 2 counts as one (1) game toward the total.
If set 2 is not completed for any reason (including the match ending before set 2 is reached), this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50.
Resolution will be based on official ITF results.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of games completed in set 2 equals or exceeds 11. Otherwise, it will resolve to "Under."
Any tiebreak in set 2 counts as one (1) game toward the total.
If set 2 is not completed for any reason (including the match ending before set 2 is reached), this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50.
Resolution will be based on official ITF results.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of games completed in the first set equals or exceeds 9. Otherwise, it will resolve to "Under."
Any first-set tiebreak counts as one (1) game toward the total.
If the first set is not completed for any reason, this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50.
Resolution will be based on official ITF results.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of games completed in the first set equals or exceeds 10. Otherwise, it will resolve to "Under."
Any first-set tiebreak counts as one (1) game toward the total.
If the first set is not completed for any reason, this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50.
Resolution will be based on official ITF results.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of games completed in the first set equals or exceeds 11. Otherwise, it will resolve to "Under."
Any first-set tiebreak counts as one (1) game toward the total.
If the first set is not completed for any reason, this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50.
Resolution will be based on official ITF results.Kenta Miyoshi enters this ITF M15 Irvine quarterfinal with a clear edge in recent professional form and ATP ranking proximity, having defeated Lambert Ruland in straight sets while holding the No. 743 spot and a career-high of 535. The Japanese right-hander brings stronger hard-court experience at the ITF level. Rudy Quan, a 20-year-old UCLA standout ranked No. 1219 with a 666 career high, advanced past Emon van Loben Sels in three sets and benefits from local familiarity on California hard courts plus junior pedigree that includes an Indian Wells title. The matchup pits Miyoshi’s consistent baseline game against Quan’s aggressive development trajectory, with limited prior head-to-head data available. Surface conditions and fatigue from the M15 schedule remain key variables for this encounter.
This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Men Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to 'Kenta Miyoshi' if Kenta Miyoshi advances against Rudy Quan.
This market will resolve to 'Rudy Quan' if Rudy Quan advances against Kenta Miyoshi.
If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50.
If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances.
If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50.
The primary resolution source will be official information from the International Tennis Federation (ITF). A consensus of credible reporting may also be used.
This market will resolve to 'Kenta Miyoshi' if Kenta Miyoshi advances against Rudy Quan.
This market will resolve to 'Rudy Quan' if Rudy Quan advances against Kenta Miyoshi.
If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50.
If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances.
If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50.
The primary resolution source will be official information from the International Tennis Federation (ITF). A consensus of credible reporting may also be used.
Thị trường mở: Jun 19, 2026, 6:00 AM ET
Khối lượng
$8Ngày kết thúc
Jun 26, 2026Thị trường mở
Jun 19, 2026, 6:00 AM ETNguồn giải quyết
https://www.itftennis.com/en/tournament-calendar/Resolver
0x65070BE91...Jun 19·10:15 PM
K. Miyoshi-
R. Quan-
$7.69 Vol.
MỚI
This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Men Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to 'Kenta Miyoshi' if Kenta Miyoshi advances against Rudy Quan.
This market will resolve to 'Rudy Quan' if Rudy Quan advances against Kenta Miyoshi.
If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50.
If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances.
If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50.
The primary resolution source will be official information from the International Tennis Federation (ITF). A consensus of credible reporting may also be used.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Miyoshi" if Kenta Miyoshi wins by 2 or more sets than Rudy Quan, based on the final completed score. Otherwise, it will resolve to "Quan."
If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50.
Resolution will be based on official ITF results.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Men Irvine, originally scheduled for June 19, 2026 at 6:15PM ET. This market will resolve to "Yes" if all games and sets required to determine a match winner under governing body or event organizer rules are played to completion through normal play. Otherwise, if the match is not completed for any reason, it will resolve to "No." If a forfeit of any kind occurs, including but not limited to a walkover or retirement, this market will resolve "No." If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to "No." The primary resolution source for this market is the official statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 2 hours after the event's conclusion, a consensus of credible reporting may be used instead.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of sets completed equals or exceeds 3. Otherwise, it will resolve to "Under."
A super tie breaker is considered as one (1) set for total set markets.
If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50.
Resolution will be based on official ITF statistics.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of games completed across all sets equals or exceeds 24. Otherwise, it will resolve to "Under."
All tiebreaks—including any Champions/Super tiebreak—count as one (1) game toward the total.
If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50.
Resolution will be based on official ITF statistics.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to “Miyoshi” if Kenta Miyoshi wins the first set. It will resolve to “Quan” if Rudy Quan wins the first set.
If the match begins but is not completed, and the first set is concluded with a winner determined, this market will resolve based on that completed set. If the first set is not completed for any reason, this market will resolve 50-50.
If the match is canceled (not played at all) or is delayed beyond 7 days from the scheduled date without play beginning, this market will resolve 50-50.
Resolution will be based on official ITF match statistics.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to “Miyoshi” if Kenta Miyoshi wins set 2. It will resolve to “Quan” if Rudy Quan wins set 2.
If the match begins but set 2 is not completed with a winner determined (including the match ending before set 2 is reached), this market will resolve 50-50.
If the match is canceled (not played at all) or is delayed beyond 7 days from the scheduled date without play beginning, this market will resolve 50-50.
Resolution will be based on official ITF match statistics.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of games completed across all sets equals or exceeds 22. Otherwise, it will resolve to "Under."
All tiebreaks—including any Champions/Super tiebreak—count as one (1) game toward the total.
If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50.
Resolution will be based on official ITF statistics.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of games completed across all sets equals or exceeds 23. Otherwise, it will resolve to "Under."
All tiebreaks—including any Champions/Super tiebreak—count as one (1) game toward the total.
If the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50.
Resolution will be based on official ITF statistics.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of games completed in set 2 equals or exceeds 9. Otherwise, it will resolve to "Under."
Any tiebreak in set 2 counts as one (1) game toward the total.
If set 2 is not completed for any reason (including the match ending before set 2 is reached), this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50.
Resolution will be based on official ITF results.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of games completed in set 2 equals or exceeds 10. Otherwise, it will resolve to "Under."
Any tiebreak in set 2 counts as one (1) game toward the total.
If set 2 is not completed for any reason (including the match ending before set 2 is reached), this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50.
Resolution will be based on official ITF results.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of games completed in set 2 equals or exceeds 11. Otherwise, it will resolve to "Under."
Any tiebreak in set 2 counts as one (1) game toward the total.
If set 2 is not completed for any reason (including the match ending before set 2 is reached), this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50.
Resolution will be based on official ITF results.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of games completed in the first set equals or exceeds 9. Otherwise, it will resolve to "Under."
Any first-set tiebreak counts as one (1) game toward the total.
If the first set is not completed for any reason, this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50.
Resolution will be based on official ITF results.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of games completed in the first set equals or exceeds 10. Otherwise, it will resolve to "Under."
Any first-set tiebreak counts as one (1) game toward the total.
If the first set is not completed for any reason, this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50.
Resolution will be based on official ITF results.This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to "Over" if the total number of games completed in the first set equals or exceeds 11. Otherwise, it will resolve to "Under."
Any first-set tiebreak counts as one (1) game toward the total.
If the first set is not completed for any reason, this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50.
Resolution will be based on official ITF results.Kenta Miyoshi enters this ITF M15 Irvine quarterfinal with a clear edge in recent professional form and ATP ranking proximity, having defeated Lambert Ruland in straight sets while holding the No. 743 spot and a career-high of 535. The Japanese right-hander brings stronger hard-court experience at the ITF level. Rudy Quan, a 20-year-old UCLA standout ranked No. 1219 with a 666 career high, advanced past Emon van Loben Sels in three sets and benefits from local familiarity on California hard courts plus junior pedigree that includes an Indian Wells title. The matchup pits Miyoshi’s consistent baseline game against Quan’s aggressive development trajectory, with limited prior head-to-head data available. Surface conditions and fatigue from the M15 schedule remain key variables for this encounter.
This market refers to the tennis match between Kenta Miyoshi and Rudy Quan in the ITF Men Irvine, originally scheduled for June 19, 2026 at 6:15PM ET.
This market will resolve to 'Kenta Miyoshi' if Kenta Miyoshi advances against Rudy Quan.
This market will resolve to 'Rudy Quan' if Rudy Quan advances against Kenta Miyoshi.
If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50.
If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances.
If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50.
The primary resolution source will be official information from the International Tennis Federation (ITF). A consensus of credible reporting may also be used.
This market will resolve to 'Kenta Miyoshi' if Kenta Miyoshi advances against Rudy Quan.
This market will resolve to 'Rudy Quan' if Rudy Quan advances against Kenta Miyoshi.
If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50.
If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances.
If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50.
The primary resolution source will be official information from the International Tennis Federation (ITF). A consensus of credible reporting may also be used.
Thị trường mở: Jun 19, 2026, 6:00 AM ET
Khối lượng
$8Ngày kết thúc
Jun 26, 2026Thị trường mở
Jun 19, 2026, 6:00 AM ETNguồn giải quyết
https://www.itftennis.com/en/tournament-calendar/Resolver
0x65070BE91...Kenta Miyoshi enters this ITF M15 Irvine quarterfinal with a clear edge in recent professional form and ATP ranking proximity, having defeated Lambert Ruland in straight sets while holding the No. 743 spot and a career-high of 535. The Japanese right-hander brings stronger hard-court experience at the ITF level. Rudy Quan, a 20-year-old UCLA standout ranked No. 1219 with a 666 career high, advanced past Emon van Loben Sels in three sets and benefits from local familiarity on California hard courts plus junior pedigree that includes an Indian Wells title. The matchup pits Miyoshi’s consistent baseline game against Quan’s aggressive development trajectory, with limited prior head-to-head data available. Surface conditions and fatigue from the M15 schedule remain key variables for this encounter.
Tóm tắt AI thử nghiệm tham chiếu dữ liệu Polymarket. Đây không phải tư vấn giao dịch và không ảnh hưởng đến cách thị trường này được giải quyết. · Cập nhật
Cẩn thận với liên kết bên ngoài.
Cẩn thận với liên kết bên ngoài.
Câu hỏi thường gặp