South Africa's Kevin Anderson returns the ball to Croatia's Ivo Karlovic during their third round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Saturday, May 31, 2014. (AP Photo/Michel Euler)
Croatia's Ivo Karlovic looks down as he plays South Africa's Kevin Anderson during their third round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Saturday, May 31, 2014. (AP Photo/Michel Euler)
Croatia's Ivo Karlovic returns the ball to South Africa's Kevin Anderson during their third round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Saturday, May 31, 2014. (AP Photo/Michel Euler)