Tennis great Serena Williams has taken to social media to show off her dramatic recent weight loss wearing an ab-baring, two-piece gown, sports bras and tight baby T-shirts. But she is absolutely sizzling in a new share, showing her in the ocean in a tropical, bright yellow bathing suit with little cut-out.

The retired tennis pro explained that she’s trying to combat the stigma associated with weight loss drugs after losing 31 pounds.

Serena Williams showed off her slim figure in a bold swimsuit after revealing she’s been using a weight-loss medication. The athlete, 43, sported a bright yellow one-piece as she posed for a series of snaps Thursday. “melanin mellow-yellow ,” she captioned the Instagram carousel — and fans were quick to hype her up in the comments.