AP, I think his camp has to look at how he has lost the matches he has on clay this year, including the Nishikori win for obvious reasons. People that beat him are on the baseline, taking time away from him and he is 20 feet behind, scrambling all over the place. Even today, during the third set, he decided to hug the baseline for a bit and attack and he had success, broke Nole .
He has to take command of the rallies early and not sit so far back. It will work against %90 of the competition but the rest can punish you for it. Also, he is returning from so far back...I know why he is doing it and when he gets his return nice and deep to neutralize the rally, it works. But his returns for the most part has been so short recently and good players punish him for it.