Serena Williams' return to singles competition at Wimbledon is already over - and the 23-time Grand Slam champion is now a doubt for her doubles appearance with sister Venus

The seven-time champion played her first match on Centre Court in four years and gave a tremendous account of herself before going down to 20-year-old Australian Maya Joint.

Serena Williams’ Wimbledon appearance in women’s doubles with sister Venus is in doubt because of a knee injury