- US Open ATP: Karen Khachanov vs Learner Tien39¢
- US Open ATP: Completed Match: Karen Khachanov vs Learner Tien50¢
- Set 1 Winner: Khachanov vs Tien45¢
- Set 2 Winner: Khachanov vs Tien44¢
- Khachanov vs. Tien: Set 2 Games O/U 9.551¢
- Khachanov vs. Tien: Set 2 Games O/U 10.550¢
- Karen Khachanov vs. Learner Tien: Total Sets O/U 3.567¢
- Karen Khachanov vs. Learner Tien: Total Sets O/U 4.529¢
- Khachanov vs. Tien: Set 1 Games O/U 8.577¢
- Khachanov vs. Tien: Set 1 Games O/U 9.555¢
- Khachanov vs. Tien: Set 3 Games O/U 8.550¢
- Khachanov vs. Tien: Set 3 Games O/U 9.550¢
This market refers to the tennis match between Karen Khachanov and Learner Tien in the US Open ATP, originally scheduled for September 7, 2026 at 11:00AM ET. This market will resolve to 'Karen Khachanov' if Karen Khachanov advances against Learner Tien. This market will resolve to 'Learner Tien' if Learner Tien advances against Karen Khachanov. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 21, 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 ATP Tour. A consensus of credible reporting may also be used.
Learner Tien enters the US Open fourth-round matchup against Karen Khachanov on a career-best home run, having advanced past Nuno Borges, Gael Monfils, and Jakub Mensik in a five-set battle on September 5 that drew strong crowd support at Louis Armstrong Stadium. The 20-year-old American, ranked No. 15 and seeded 14th, seeks his second consecutive Grand Slam quarterfinal after his Australian Open result earlier in 2026. Khachanov, ranked No. 50, arrives with momentum from straight-sets wins over Roman Burruchaga and Benjamin Bonzi plus a notable second-round upset of third seed Felix Auger-Aliassime, who battled physical issues. The pair has no prior head-to-head, with Tien holding the edge in recent form and ranking on hard courts.