LONDON, July 1 : Serena Williams will do everything to be ready for her Wimbledon doubles campaign alongside older sister Venus after sustaining a knee injury during her opening singles defeat on Tuesday, the American's agent said.The 44-year-old's highly anticipated comeback to competitive action after four

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