Coco Gauff was 22 years old as the youngest singles semifinalist at the 2026 US Open.
Gauff was the youngest player to reach either the men’s or women’s singles semifinals at the tournament. Her age stood out in a semifinal group that included several established Grand Slam contenders.
The statistic covers both singles draws, so “youngest semifinalist” does not mean youngest player in the entire tournament. Players can be much younger in qualifying, junior events, doubles, or early main-draw rounds without reaching the semifinals.
Gauff’s semifinal appearance added another deep US Open run to her career in New York. She had already won the 2023 US Open women’s singles title, making the tournament one of the defining venues of her career.