Arsenal midfielders Martín Zubimendi, Declan Rice, and Mikel Merino top trader consensus in the wide-open UEFA Champions League most yellow cards market due to their elevated tallies and sustained high-minute roles in physical fixtures. Zubimendi leads with four bookings across twelve appearances, while Rice and Merino each sit on three, reflecting frequent tackles and fouls from combative central positions during Arsenal’s deep knockout run to the semifinals. This fixture volume gives them repeated exposure compared to teams eliminated earlier, though yellow-card resets after the quarterfinals and a crowded field of players on four or five cautions keep probabilities fragmented. Their aggressive pressing and duel-winning styles differentiate them from less disciplined or lower-minute peers heading into remaining matches.