You would have caught them in action at the BNP Paribas WTA Finals Singapore presented by SC Global (ok, that was a mouthful) in Singapore held at the Singapore Indoor Stadium over the last three years, if they had qualified.
But while they appear on court in their tennis gear, it is rare to see the likes of Serena Williams (world number 1), Caroline Wozniacki (world number 18) and Eugenie Bouchard (world number 44) in a swimsuit.
But all thanks to Sports Illustrated Swimsuit 2017 edition, we now know that Serena Williams is officially a thong girl.
Click here more photos of the Sports Illustrated Swimsuit 2017 edition.
Or if you may, just keep scrolling down. Happy Friday!
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ALL PHOTOS SOURCED here.