Serena Williams has a must-see bikini body. Williams, 44, showed off her slimmed-down figure while posing in a black swimsuit in the latest cover story for NET-A-PORTER'S digital site, PORTER, on Monday, December 1. In her photo shoot, the tennis pro rocked an Alaïa swimsuit, featuring a high neck, a cutout over her abs and a cheeky back. Williams styled the number with coordinating Alaïa heels. She added a touch of sparkle to her ensemble with gold earrings by Pariah, adorned with diamonds. For glam, she donned a full beat including long lashes, filled-in eyebrows and lined lips.