London, England (SportsNetwork.com) - Serena Williams and her older sister Venus took the court for a second-round doubles match at Wimbledon on Tuesday only to retire after just three games because of some disorientation from Serena.
Serena struggled mightily during her warm-up for the match, mishandling tennis balls and looking out of sorts, and that behavior continued as the match was about to begin.
The 32-year-old Serena had tears in her eyes as medical staff attended to her, with Venus sitting next to her. They did go on court to start the match, but it was obvious that something was wrong with the younger sibling.
A doctor said to Serena: "If you can't see the ball, you shouldn't play."
The eighth-seeded sisters lost to German Kristina Barrois and Swiss Stefanie Voegele, 3-0.
Serena, who was shocked in the singles draw here on Saturday, was later diagnosed with a viral illness.