Please turn on JavaScript. Media requires JavaScript to play. Defending Wimbledon champion Serena Williams admits she "needs to do better" after her last 16 loss to Sabine Lisicki on Monday. Williams lost 6-2, 1-6, 4-6 on centre court, which ends her 34-match winning streak. World number one Williams is one of a number of big-name players to have exited the...
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