NEW YORK (AP)—American John Isner served 24 aces and maxed out at 144 mph to win his second-round match at the U.S. Open.
The 18th-seeded Isner, the highest ranked U.S. man left in the tournament, defeated Switzerland’s Marco Chiudinelli 6-3, 3-6, 7-6 (7), 6-4 on Friday.
Isner, who defeated Nicolas Mahut 70-68 in the fifth set of the first round at Wimbledon, has spent just under five hours on the court in his two wins at Flushing Meadows—still six hours less than he spent in the history-making win over Mahut.
He needs one more win to match his best showing ever at the U.S. Open or any Grand Slam tournament.