BBC Sport - Wimbledon 2015: Can Serena Williams win a sixth title?
What does it take to beat Serena?
- From the section Tennis
Former world number one Tracy Austin discusses Serena Williams' strengths and weaknesses, and whether she is likely to win her sixth title.
The top seed plays Britain's Heather Watson in the third match on centre court on Friday, with the action likely to start at around 17:00 BST.
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