I wasn't good enough - Williams

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 annual tournament in the early stages.

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