Wimbledon 2013: Serena Williams has fun under roof

Defending champion Serena Williams claims her 600th career win by beating Kimiko Date-Krumm 6-2 6-0 on Centre Court to progress to the last 16 of Wimbledon.

The world number one took only 61 minutes to overcome the 42-year-old Japanese in straight sets, and later described the experience as "fun".

Williams will face Germany's Sabine Lisicki for a place in the quarter-finals.

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