Venus Williams returns during her loss to Angelique Kerber of Germany at… (Elise Amendola / Associated…)
John Isner stayed in the hunt for a medal for the U.S. tennis team in the Olympics at Wimbledon on Wednesday, but next up is No. 1 Roger Federer.
Isner, the only remaining U.S. man in the draw, got into yet another long duel at Wimbledon, winning this time over Janko Tipsarevic of Serbia, 7-5, 7-6 (14). His match with Federer will be a quarterfinal.
Another U.S. player, Venus Williams, a gold-medal winner in three Olympics — twice in women's doubles and once in singles — lost to Germany's Angelique Kerber in two tiebreakers, with an identical 7-5 tiebreaker score in each.
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The defense of the men's doubles gold medal was lost when Federer and Swiss teammate Stan Wawrinka were knocked out by Andy Ram and Jonathan Erlich of Israel, after a 6-1 start in the first set. The scores were 1-6, 7-6 (5), 6-3.
Two main challengers to Federer struggled, but survived.
Second-seeded Novak Djokovic got a battle from Aussie grass court veteran Lleyton Hewitt — he won the Wimbledon title in 2002 — but the Serb recovered to win, 4-6, 7-5, 6-1. Third-seeded Andy Murray, still carrying the tennis hopes of all of England after his near miss three weeks ago at Wimbledon, beat Marcos Baghdatis of Cyprus, 4-6, 6-1, 6-4.
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Maria Sharapova, playing for Russia and seeded third, also struggled, but ended up outlasting Sabine Lisicki of Germany, 6-7 (8), 6-4, 6-3. The women's top-seeded player, Victoria Azarenka of Belarus, got past veteran Russian Nadia Petrova, 7-6 (6), 6-4.