Spain's Rafael Nadal returns the ball to Latvia's Ernests Gulbis during their match at the Italian Open tennis tournament in Rome, Thursday, May 16, 2013. (AP Photo/Andrew Medichini)

Associated Press
Spain's Rafael Nadal returns the ball to Latvia's Ernests Gulbis during their match at the Italian Open tennis tournament in Rome, Thursday, May 16, 2013. (AP Photo/Andrew Medichini)
Spain's Rafael Nadal returns the ball to Latvia's Ernests Gulbis during their match at the Italian Open tennis tournament in Rome, Thursday, May 16, 2013. (AP Photo/Andrew Medichini)