Juan Monaco from Argentina discusses a point with umpire Carlos Bernardes during a Madrid Open tennis tournament match against Rafael Nadal from Spain in Madrid, Spain, Wednesday, May 7, 2014. (AP Photo/Andres Kudacki)
Rafael Nadal from Spain returns a ball during a Madrid Open tennis tournament match against Juan Monaco from Argentina, in Madrid, Spain, Wednesday, May 7, 2014. (AP Photo/Andres Kudacki)
Rafael Nadal from Spain returns the ball during a Madrid Open tennis tournament match against Juan Monaco from Argentina, in Madrid, Spain, Wednesday, May 7, 2014. (AP Photo/Andres Kudacki)