Serena Williams and Venus Williams are on the schedule for Saturday's play at Wimbledon - but time will tell if they take to the court as Serena contends with a knee injury.

Williams, 44, will team with her sister, Venus, in women’s doubles at Wimbledon starting Thursday.

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.