Everyone is talking about the US Open this week, as the annual tournament kicked off Monday in New York.

From Serena Williams and Anna Kournikova to Andy Roddick and Rafael Nadal, RadarOnline.com has photos of sexiest tennis players who have steamed up the courts of the competition -- stripped down and showing off their hard bodies in bikinis and trunks!

PHOTOS: The Hottest Bodies In Tennis -- Stripped Down!

Serena and Venus Williams have more in common than their sexy serves! The professional tennis players both bring booty to the beach, when they strip down into the skimpiest of bikinis.

PHOTOS: Bikini Wars!  Sexy South & North Of The Border Beauties

Jennifer Esposito might have scored love -- and an engagement ring -- from Aussie tennis hunk Mark Philippoussis, but after less than a year, RadarOnline.com has learned it's game, set and match for the couple.

The pair had been planning to marry, but a source close to the one-time lovebirds revealed their recent split because of "irreconcilable differences".

PHOTOS: Celebrity Break-Ups

"They just couldn't get along," said a source close to both.