Serena Williams retired from her first-round match at Wimbledon on Tuesday against Aliaksandra Sasnovich with a left leg injury.
Holding a 3-1 lead in the first set, Williams slipped and needed to take an injury timeout at the game's conclusion to receive treatment. She returned to the court, but her movement was visibly limited.
Williams was serving in the fifth game at Centre Court when she lost her footing near the baseline while hitting a forehand. She winced and stepped gingerly between points, clearly troubled.
After dropping that game, she took a medical timeout and tried to continue playing.