- Set 2 Winner: Vallejo vs Monfils53¢
- Vallejo vs. Monfils: Set 1 Games O/U 9.553¢
- Set 1 Winner: Vallejo vs Monfils53¢
- US Open ATP: Completed Match: Adolfo Vallejo vs Gael Monfils50¢
- Vallejo vs. Monfils: Set 3 Games O/U 8.550¢
- Vallejo vs. Monfils: Set 3 Games O/U 10.550¢
- Vallejo vs. Monfils: Set 1 Games O/U 8.573¢
- Vallejo vs. Monfils: Set 3 Games O/U 9.550¢
- Vallejo vs. Monfils: Set 4 Games O/U 8.550¢
- Vallejo vs. Monfils: Set 4 Games O/U 9.550¢
- US Open ATP: Adolfo Vallejo vs Gael Monfils56¢
- Vallejo vs. Monfils: Set 2 Games O/U 9.550¢
This market refers to the tennis match between Adolfo Vallejo and Gael Monfils in the US Open ATP, originally scheduled for August 30, 2026 at 11:00AM ET. This market will resolve to 'Adolfo Vallejo' if Adolfo Vallejo advances against Gael Monfils. This market will resolve to 'Gael Monfils' if Gael Monfils advances against Adolfo Vallejo. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 13, 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.
Adolfo Daniel Vallejo, the world No. 61 Paraguayan with a career-high ranking, faces veteran Frenchman Gael Monfils in the US Open first round on hard courts. Vallejo arrives after strong hard-court showings in Cincinnati, where he defeated Kyrian Jacquet and Valentin Vacherot before falling to Tommy Paul, and holds a solid 2026 record on the surface. Monfils, ranked outside the top 300 at age 39 and entering on a wildcard, has posted a modest 4-9 singles mark this season with limited main-draw activity, though he reached the mixed-doubles semifinals alongside Elina Svitolina. Their first career meeting pits Vallejo’s rising consistency and ranking advantage against Monfils’ experience and athleticism on the fast hard courts of Flushing Meadows.