Originally Posted by TMF
A player don't have to be injured in order to take the MTO, in case you didn't know. If a player decides to delay the match to regroup or weather the storm, he can call MTO anytime. The umpire has no idea if a player is really hurt or not anyway.
Of course, I was referring to the fact that it's only natural Fed would take less MTOs than Rafa, because he has had much less problems with injuries. It isn't anything that somehow speaks better of him than of Nadal nor anything like that. It's completely logical.