Serbia's Novak Djokovic serves to Spain's Rafael Nadal during their Monte-Carlo ATP Masters Series Tournament tennis final match on April 21, 2013 in Monaco. AFP PHOTO / VALERY HACHE (Photo credit should read VALERY HACHE/AFP/Getty Images)
Serbia's Novak Djokovic serves to Spain's Rafael Nadal during their Monte-Carlo ATP Masters Series Tournament tennis final match on April 21, 2013 in Monaco. AFP PHOTO / VALERY HACHE (Photo credit should read VALERY HACHE/AFP/Getty Images)