Let's say for the sake of argument that he was being coached. Why don't they show it? Especially if he's this serial cheater?
Sorry, I don't buy it, because if they had evidence there is no way they wouldn't show it. They'd be combing through the video reels looking for anything they could find to discredit Nadal. It's not that they don't like him, but to me, they consider it a personal affront that this throwback game, ergo, the game they used to play is being played by Federer, and being trumped. So of course, they're going to hype him, but it comes with a two-edged sword. This elegant, beautiful game that they love so much isn't effective against Nadal's game, and it fairly kills them. They want their ideas and opinions to reign supreme and Rafa knocks the air out of their arrogance.
There are too many times these allegations are thrown out by JMac and crew without a shred of proof.
I've been at matches and have seen coaches unabashedly coaching and not one word was said to the player or the coach. This is just another ill disguised attempt to elevate their friend, client, and social buddy.