There was an upset at Rolland Garros in Paris, or was it a changing of the guard? The defending French Open Champion Serena Williams was unable to defend her title against upstart Garbine Muguruza of Spain (Born in Venezuela) in a brisk two sets (7-5, 6-4). Muguruza seemed to be the first Williams opponent to out Serena her. More power. More speed. With Serena's recent (and not as recent) dominance, there hasn't been room on the stage for another women's player to run off a few tournaments. Will Muguruza be the one? Her next test is at the Wimbledon Championship. Where she met Williams last year in the finals. Is a rematch afoot? Only those that seed the players can make it happen. But if Muguruza makes it two in a row, the guard might have changed. For now, she breaks through as our Sportswoman of the Week!