Probably talks to Rafa through his watch
I can't believe the level of hypocrisy that goes on in here when it comes to coaching. Has your favorite player ever looked to his box(to confirm a ball mark or anything else)? Guess what, according to the rulebook that was coaching. And I already know what some of you will say - but there is a difference between hand signals and discreetly nodding to your player yes or no for a ball mark. That may well be but in the eyes of the rulemakers, that would still be COACHING.
What kind of a rule is this that you can break it a little but not too much? Why do you think it's barely enforced on tour? Because it's a joke.
The reason why the Nadal camp(who do coach) is fined for coaching once in a blue moon is because they are more upfront with it. If the ATP were serious about this rule, there wouldn't pass a Nadal match without a fine of some sort for coaching. And this isn't because Nadal is famous. In all likelyhood his camp was coaching from at least 2005 if not before and umps still ignored it.
Why? Because these guys know that what is on paper and the reality of the tour is far different, not that anybody wants to admit that. They would rather hush up about it so they communicate(discreetly for most coaches) in peace while the matches are going on.