Latvia's Ernests Gulbis returns the ball during the third round match of the French Open tennis tournament against Radek Stepanek of the Czech Republic at the Roland Garros stadium, in Paris, France, Friday, May 30, 2014. (AP Photo/David Vincent)
Latvia's Ernests Gulbis returns the ball during the third round match of the French Open tennis tournament against Radek Stepanek of the Czech Republic at the Roland Garros stadium, in Paris, France, Friday, May 30, 2014. (AP Photo/David Vincent)
Argentina's Facundo Bagnis returns the ball to Latvia's Ernests Gulbis during their second round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Wednesday, May 28, 2014. (AP Photo/Darko Vojinovic)
Latvia's Ernests Gulbis eyes the ball as he plays Argentina's Facundo Bagnis during their second round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Wednesday, May 28, 2014. (AP Photo/Darko Vojinovic)