Rafael Giotis, the 25-year-old German ranked around 1,350-1,377 ATP, brings greater experience and a career-high ITF ranking near 93 into this M25 Oldenzaal clash against 18-year-old Dutch qualifier Sammy Guinau. Giotis has posted mixed 2026 results across clay and hard courts, including recent qualifier wins in Astana and Metzingen alongside losses in Kayseri and Lambermont. Guinau, with an ITF career-high near 792 and a 3-4 clay record this season, gains potential local support and familiarity in the Netherlands after advancing through M25 The Hague and Amstelveen draws. No prior head-to-head exists; surface conditions, recent match loads, and typical ITF variance will shape the outcome.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedAll Sports
MLB
UFC
All
UEFA Champions League
Liga MX
MLS
Club Friendlies
Premier League
Categoría Primera A
LaLiga
K League 2
Serie A
Eliteserien
Brasileirão Série A
Allsvenskan
Copa Sudamericana
Liga Nacional de Guatemala
K League 1
UEFA Conference League
Uruguayan Primera División
Brasileirão Série B
Chinese Super League
Ligue 1
DFB-Pokal
Bolivian Primera División
China League One
Primeira Liga
Liga 1
UEFA Europa League
Copa Libertadores
J2 League
USL League One
Saudi Pro League
USL Championship
Superettan
Bundesliga
Ekstraklasa
Liga de Primera
Primera Nacional
SuperLiga
efbet Liga
Eredivisie
Kazakhstan Premier League
Danish Superliga
Ligue 2
Scottish Premiership
Ukrainian Premier League
Süper Lig
J1 League
League of Ireland Premier Division
Categoría Primera B
Copa do Brasil
Veikkausliiga
Virslīga
Primera B (Chile)
EFL Championship
ÖFB Cup
Scotland League Cup
OBOS-ligaen
Uzbekistan Super League
Leagues Cup
Eerste Divisie
LaLiga2
NWSL
Austria Bundesliga
Niké liga
UEFA Women's Champions League
Besta deild karla
NB I
Serbian SuperLiga
Slovenia PrvaLiga
Israeli Premier League
Brasileirão Série C
A Lyga
2. Bundesliga
Belgium Pro League
Australia Cup
LigaPro Serie A
National League
Scottish Cup
Chance Liga
Greece Super League
Greek Cup
League Two
TFF Süper Kupa
Turkey 1. Lig
Swiss Super League
League One
Prva Liga
Qatar Stars League
Premium Liiga
Liga FPD
Egyptian Premier League
ASEAN Championship
Venezuelan Primera División
Copa Argentina
Coppa Italia
A-League Men
Liga Profesional de Fútbol
EFL CUP
Taça de Portugal
KNVB Beker
Erovnuli Liga
Challenger Pro League
UAE Pro League
Serie B
Betri deildin
German Super Cup
Hockey
Cycling
Poker
Chess
Pickleball
Volleyball
Esports
Rafael Giotis – Sammy Guinau
Moneyline
$0 Vol.
This market will resolve to 'Rafael Giotis' if Rafael Giotis advances against Sammy Guinau.
This market will resolve to 'Sammy Guinau' if Sammy Guinau advances against Rafael Giotis.
If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 7, 2026, 11:59 PM ET (14 days after the scheduled start), 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.
Market Opened: Aug 23, 2026, 8:14 PM ET
Resolution Source
https://www.itftennis.com/en/tournament-calendar/Resolver
0x65070BE91...Rafael Giotis – Sammy Guinau
Moneyline
$0 Vol.
This market will resolve to 'Rafael Giotis' if Rafael Giotis advances against Sammy Guinau.
This market will resolve to 'Sammy Guinau' if Sammy Guinau advances against Rafael Giotis.
If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 7, 2026, 11:59 PM ET (14 days after the scheduled start), 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.
Market Opened: Aug 23, 2026, 8:14 PM ET
Resolution Source
https://www.itftennis.com/en/tournament-calendar/Resolver
0x65070BE91...Rafael Giotis, the 25-year-old German ranked around 1,350-1,377 ATP, brings greater experience and a career-high ITF ranking near 93 into this M25 Oldenzaal clash against 18-year-old Dutch qualifier Sammy Guinau. Giotis has posted mixed 2026 results across clay and hard courts, including recent qualifier wins in Astana and Metzingen alongside losses in Kayseri and Lambermont. Guinau, with an ITF career-high near 792 and a 3-4 clay record this season, gains potential local support and familiarity in the Netherlands after advancing through M25 The Hague and Amstelveen draws. No prior head-to-head exists; surface conditions, recent match loads, and typical ITF variance will shape the outcome.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedBeware of external links.
Beware of external links.
Beware of external links.
Beware of external links.
Frequently Asked Questions