Tennis U.S. Open No. 5 Seed Tsonga Upset in 2Nd Round

Before Frenchman Tsonga's loss, top-five seeds on the men's and women's sides had played 14 matches at the tournament - and won all 14 in straight sets.

NEW YORK - After three days of the top players winning decisively, fifth-seeded Jo-Wilfried Tsonga was upset by Martin Klizan of Slovakia in the second round yesterday in the first shock of this year's U.S. Open. The 52nd-ranked Klizan won 6-4, 1-6, 6-1, 6-3.

Before Frenchman Tsonga's loss, top-five seeds on the men's and women's sides had played 14 matches at the 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. Klizan, 23, meanwhile had failed to make it past the second round in three previous Grand Slam appearances. He had never defeated an opponent ranked higher than No. 49.

Jack Sock also reached the third round at a major tournament for the first time. The 19-year-old American beat Italy's 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 for Sock 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. Almagro needed five sets and three hours, 19 minutes to defeat the German.

In women's second-round action yesterday, 13th-seeded Dominika Cibulkova and No. 14 Maria Kirilenko advanced in straight sets.

Japan's Kei Nishikori, seeded 17th on the men's side, eliminated American Tim Smyczek.