I will continue playing until Roger Federer stops: Serena
Twenty-three-time Grand Slam champion Serena Williams jokingly said she will continue playing until 20-time Grand Slam winner Roger Federer stops. "How long? Did he put a time limit on it...We in it together. As long as he's here, I'm going to try to be here," the 36-year-old added. Notably, Serena turned pro in 1995 while Federer turned pro in 1998. 