What was the fastest serve recorded at the 2026 US Open?

The fastest serve recorded at the 2026 US Open was 149 mph, hit by Ben Shelton. He produced that speed during his quarterfinal victory over defending champion Carlos Alcaraz.

Shelton’s serve was one of the defining statistical moments of the tournament. He defeated Alcaraz in five sets, 6–7(5), 6–1, 6–3, 1–6, 7–6(7), and reached the final before losing to Alexander Zverev.

A radar-gun reading measures the speed of the serve, usually shortly after the ball leaves the racket. It does not measure the average speed of every serve or determine who won the match. A player may hit the fastest serve of an event without winning the tournament.

Shelton’s 149 mph mark was the tournament’s fastest serve, not the fastest serve in tennis history. Record comparisons depend on event, equipment and measurement conditions.