there is only 1 way out of this mess:
and that invariably means practice, practice, and then practice some more.
he has to give up everything else and just work on his damn game. he has to put in long hard hours on clay to make his ground game nearly bullet proof.
that is what it takes to win big these days.
that is why you don't see anybody else winning big other than nadal (when he is healthy and fit), nole, murray, and roger.
that is it. there are only 4 and 3 of them are all time greats.
if the others want to win big then they have to give up everything for a while and slave away on the practice courts.