$ 0 0 SerenaWilliams of the U.S. covers her face after missing a return during the second round match of the FrenchOpen tennis tournament against Spain's Garbine Muguruza at the Roland Garros stadium, in Paris, France, Wednesday, May 28, 2014. Williams lost in two sets 2-6, 2-6. Garbine Muguruza of Spain reacts during her women's singles match against SerenaWilliams of the U.S. at the FrenchOpen tennis tournament at the Roland Garros stadium in Paris May 28, 2014.USA's SerenaWilliams (R) shakes hands with Spain's Garbine Muguruza at the end of their French tennis Open second round match at the Roland Garros stadium in Paris on May 28, 2014. SerenaWilliams of the U.S. returns a forehand to Garbine Muguruza of Spain during their women's singles match at the FrenchOpen tennis tournament at the Roland Garros stadium in Paris May 28, 2014Garbine Muguruza of Spain reacts during her women's singles match against SerenaWilliams of the U.S. at the FrenchOpen tennis tournament at the Roland Garros stadium in Paris May 28, 2014. Spain's Garbine Muguruza returns the ball during the second round match of the FrenchOpen tennis tournament against SerenaWilliams of the U.S. at the Roland Garros stadium, in Paris, France, Wednesday, May 28, 2014.SerenaWilliams of the U.S. reacts during her women's singles match against Garbine Muguruza of Spain at the FrenchOpen tennis tournament at the Roland Garros stadium in Paris May 28, 2014. SerenaWilliams of the U.S. gestures after missing a return during the second round match of the FrenchOpen tennis tournament against Spain's Garbine Muguruza at the Roland Garros stadium, in Paris, France, Wednesday, May 28, 2014.Spain's Garbine Muguruza celebrates her victory over USA's SerenaWilliams at the end of their French tennis Open second round match at the Roland Garros stadium in Paris on May 28, 2014USA's SerenaWilliams reacts after being defeated by Spain's Garbine Muguruza at the end of their French tennis Open second round match at the Roland Garros stadium in Paris on May 28, 2014.