Spain's Rafael Nadal returns a backhand to Serbia's Novak Djokovic during their final match at the Italian Open tennis tournament, in Rome, Sunday, May 18, 2014. (AP Photo/Andrew Medichini)
Spain's Rafael Nadal returns the ball to Serbia's Novak Djokovic during their final match at the Italian Open tennis tournament, in Rome, Sunday, May 18, 2014. (AP Photo/Andrew Medichini)
Serbia's Novak Djokovic returns the ball to Spain's Rafael Nadal during their final match at the Italian Open tennis tournament, in Rome, Sunday, May 18, 2014. (AP Photo/Andrew Medichini)
Spain's Rafael Nadal returns the ball to Bulgaria's Grigor Dimitrov, during their semifinal match at the Italian open tennis tournament in Rome, Saturday, May 17, 2014. Nadal won 6-2, 6-2. (AP Photo/Gregorio Borgia)
Spain's Rafael Nadal returns the ball to Bulgaria's Grigor Dimitrov, during their semifinal match at the Italian open tennis tournament in Rome, Saturday, May 17, 2014. Nadal won 6-2, 6-2. (AP Photo/Gregorio Borgia)