NEW YORK — This U.S. Open finally got its first shocker.
After three days of the top players not only winning but winning decisively, fifth-seeded Jo-Wilfried Tsonga was upset by Martin Klizan of Slovakia in the second round. The 52nd-ranked Klizan won 6-4, 1-6, 6-1, 6-3 on Thursday.
Before Tsonga’s loss, top-five seeds on the men’s and women’s sides had played 14 matches at this year’s tournament — and won all 14 in straight sets.
Tsonga was the runner-up at the 2008 Australian Open and a semifinalist at Wimbledon this year. He had reached at least the third round in 18 straight Grand Slam trips.
The 23-year-old Klizan, meanwhile, had failed to make it past the second round in three previous Grand Slam appearances. He had never defeated an opponent ranked better than No. 49.
“I had no pressure,” Klizan said. “If I lose, then I lose. I lose with (a) good player. But I won and I’m very happy. It means for me more that I beat finally a guy from top 10.”
Jack Sock also reached the third round at a major tournament for the first time. The 19-year-old American beat Flavio Cipolla 6-2, 6-2, 6-4.
Sock, ranked 248th, got in with a wild card. He saved 12 of the 13 break points he faced, while converting all six he earned on the 88th-ranked Cipolla’s serve.
Next up is a meeting with No. 11 Nicolas Almagro of Spain, a 6-3, 5-7, 5-7, 6-4, 6-4 winner against Philipp Petzschner.
A week before the start of the Open, Ana Ivanovic couldn’t walk without pain in her right foot.
“That’s when I started to panic a little bit,” she said.
Two matches into the tournament, the 2008 French Open champion is feeling healthy — and relaxed. The 12th-seeded Ivanovic and another Serbian former top-ranked player, Jelena Jankovic, have quietly reached the third round at Flushing Meadows. Each has dropped just nine games through a pair straight-set wins.
Ivanovic beat 51st-ranked Sofia Arvidsson of Sweden 6-2, 6-2 on Thursday.
Asked if the torn tendon is fully healed, Ivanovic laughed and said, “I still have a handful of pills every morning.”
But the foot hasn’t been hurting since the tournament started, and Ivanovic’s draw is looking fairly painless with Caroline Wozniacki and Francesca Schiavone eliminated in her quarter.