Serena Williams Injures Knee at Wimbledon, Doubles With Venus in Doubt — photo 6 of 7

Serena Williams injured her right knee during her first-round singles match at Wimbledon on Tuesday, casting doubt on her scheduled doubles appearance with sister Venus later this week. The 44-year-old tennis star lost to Maya Joint 6-3, 6-7, 6-3 after tweaking her knee at the end of the first set.