Costoulas vs. Koevermans: Match O/U 21.5

This market refers to the tennis match between Sofia Costoulas and Anouk Koevermans in the Oeiras 4, originally scheduled for April 21, 2026 at 5:00AM 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 WTA Challenger statistics.