Watch: Serena Williams Details "Discovering" Herself Again After RetirementSerena Williams doesn't want you to call it a comeback. After reports that the 44-year-old registered with the International Tennis Integrity Agency's (ITIA) testing pool, three years after officially retiring from the sport, Serena addressed whether it meant she was officially returning to the sport. "Omg yall," Serena wrote on a Dec. 2 post on X. "I'm NOT coming back. This wildfire is crazy.