Jo-Wilfried Tsonga ran out of gas against Slovakian Martin Klizan. (Cameron Spencer/GETTY IMAGES)

The big Frenchman rallied from early deficits to extend semifinals against Novak Djokovic (French Open) and Andy Murray (Wimbledon) in his last two Grand Slam tournaments. And last month at the Olympics, Tsonga outlasted Milos Raonic in a three-set match that lasted an Olympic-record 66 games.

But on Thursday at the U.S. Open, Tsonga just didn’t have it in a 6-4, 1-6, 6-1, 6-3 loss to Slovakian Martin Klizan. The No. 5 seed in the draw, Tsonga is the first single-digit man to fall.

After dropping the opening set, Tsonga stormed back to take the second in convincing fashion. But his erratic play returned in the third and the 23-year-old Klizan took advantage.


Jack Sock is making a run at Flushing Meadows. (Mel C. Evans/AP)

Klizan, unseeded and ranked No. 52 in the world, had never advanced beyond the second round at a major.

In other Thursday action, 19-year-old American Jack Sock advanced to the third round with an impressive 6-2, 6-2, 6-4 win over Italian Flavio Cipolla. He’ll face Spaniard Nicolas Almagro, the No. 11 seed, who survived a five-setter against Philipp Petzschner of Germany, 6-3, 5-7, 5-7, 6-4, 6-4.

On the women’s side, top seeds Ana Ivanovic (12), Dominika Cibulkova (13) and Maria Kirilenko (14) all advanced in straight sets.

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