Ben Shelton hit the fastest serve of the 2026 US Open, reaching 149 mph.
The American produced that radar-gun reading during his men’s singles quarterfinal against Carlos Alcaraz. Shelton won the dramatic five-set match, using his powerful left-handed serve as one of his biggest weapons.
A fast serve is measured at contact by the tournament’s speed-tracking equipment. It is different from a player’s average first-serve speed, because a single peak delivery determines the tournament fastest-serve statistic.
Shelton eventually reached the men’s singles final, where he lost to top seed Alexander Zverev. The 149 mph figure therefore belongs to Shelton’s quarterfinal performance, not to the final or semifinal. It was the fastest serve recorded anywhere in the 2026 tournament.