- Set Handicap: Osaka (-1.5) vs Siniakova (+1.5)53¢
- Osaka vs. Siniakova: Set 2 Games O/U 9.550¢
- Osaka vs. Siniakova: Match O/U 22.543¢
- Set 1 Winner: Osaka vs Siniakova72¢
- US Open WTA: Naomi Osaka vs Katerina Siniakova79¢
- US Open WTA: Completed Match: Naomi Osaka vs Katerina Siniakova50¢
- Osaka vs. Siniakova: Set 1 Games O/U 8.569¢
- Naomi Osaka vs. Katerina Siniakova: Total Sets O/U 2.535¢
- Set 2 Winner: Osaka vs Siniakova72¢
- Osaka vs. Siniakova: Set 2 Games O/U 8.550¢
- Game Spread: Osaka (-4.5) vs Siniakova (+4.5)52¢
- Osaka vs. Siniakova: Set 1 Games O/U 9.543¢
This market refers to the tennis match between Naomi Osaka and Katerina Siniakova in the US Open WTA, originally scheduled for September 2, 2026 at 11:00AM ET. This market will resolve to 'Naomi Osaka' if Naomi Osaka advances against Katerina Siniakova. This market will resolve to 'Katerina Siniakova' if Katerina Siniakova advances against Naomi Osaka. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 16, 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 WTA Tour. A consensus of credible reporting may also be used.
Naomi Osaka enters this US Open second-round matchup on outdoor hard courts with strong recent momentum after a resilient first-round tiebreak victory over Anastasia Zakharova and solid hard-court results in Washington and Toronto earlier this summer. The two-time US Open champion and No. 13 seed holds a 2-1 head-to-head edge over Katerina Siniakova, including a straight-sets win at Wimbledon last year, while her powerful serve and groundstrokes have produced consistent Grand Slam results in 2026, including a Wimbledon quarterfinal. Siniakova, ranked No. 42 and stronger in doubles, advanced past Elisabetta Cocciaretto but has struggled against top-20 opponents in majors and holds limited recent singles success on hard courts. The match pits Osaka's proven hard-court pedigree and current form against Siniakova's experience in high-level events.