Serena Williams makes a return to sister Venus Williams during their singles match against at the All England Lawn Tennis Championships in Wimbledon, London, Monday July 6, 2015.
Serena Williams makes a return to sister Venus Williams during their singles match against at the All England Lawn Tennis Championships in Wimbledon, London, Monday July 6, 2015. Alastair Grant AP
Serena Williams makes a return to sister Venus Williams during their singles match against at the All England Lawn Tennis Championships in Wimbledon, London, Monday July 6, 2015. Alastair Grant AP