Serbia's Anna Ivanovic returns the ball during the first round match of the French Open tennis tournament against France's Caroline Garcia at the Roland Garros stadium, in Paris, France, Tuesday, May 27, 2014. (AP Photo/Michel Spingler)
Madison Keys, of the U.S, returns the ball to Italy's Sara Errani during the first round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Tuesday, May 27, 2014. (AP Photo/David Vincent)
Italy's Sara Errani serves to Madison Keys, of the U.S, during the first round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Tuesday, May 27, 2014. (AP Photo/David Vincent)
Britain's Andy Murray tries to return the ball to Kazakhstan's Andrey Golubev during the first round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Tuesday, May 27, 2014. (AP Photo/David Vincent)
France's Kristina Mladenovic reacts as she defeats China's Li Na during the first round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Tuesday, May 27, 2014. (AP Photo/David Vincent)