John Isner’s serve is scary. The 6-foot-9 American hit 144 mph on the gun Friday during his 6-3, 3-6, 7-6, 6-4 victory over Marco Chiudinelli in the second round of the 2010 U.S. Open. The 18th-seeded Isner had 24 aces, including a few during the final game of the match.
2010 U.S. Open Second Round Result: John Isner Blasts His Way to Victory
Isner, who’s been battling leg injuries since his epic at Wimbledon, survived despite piling up 44 unforced errors.
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