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