WIMBLEDON, England -- Serena Williams announced she would not be able to play in the doubles draw at the All England Club alongside sister Venus in an Instagram post Saturday.
"I'm heartbroken to have to withdraw from doubles," Williams wrote. "Coming back to compete again has been a gift, and the opportunity to play alongside [Venus Williams] once more meant the world to me. I did everything I could to be ready, but unfortunately my knee just isn't ready to compete."
View this post on Instagram A post shared by Serena Williams (@serenawilliams)
Along with a video of herself walking with a heavily bandaged right knee, she included pictures of four syringes that had collected fluid from her knee and of herself receiving treatment.
Williams, 44, who had made her eagerly anticipated return to competition last month, had received a wild card to play both singles and doubles at the grass-court major. She played her first singles match in nearly four years Tuesday against Maya Joint on Centre Court. Williams lost the marathon match 6-3, 6-7 (6), 6-3.
Williams, who did not speak to the media following the loss, issued a statement about the experience.