The semifinal brackets are set, and the competition for the Olympic gold medal in women's beach volleyball comes down to its final four: Brazil, China, and two American teams, including the famed duo of Misty May Treanor and Kerri Walsh Jennings.

Americans may have a stranglehold on the sport and are the favorite to win the competition, but when it comes to posteriors in those bikini bottom uniforms, the playing field is level and too close to call. There are great rears from all four corners of the globe. Just take a look at this gallery of The Greatest Beach Volleyball Back Shots.