clay for getting that ground game back. he has to go hit a million backhands and a few million forehands.
clay for safety and security: he faces nothing but injuries on the hard courts.
grass season is over after Wimbledon. all he can do on grass is gather a few points and take a few matches to keep the momentum going.
too much time on hard courts ends his career. you saw what happened after the u.s. open in 2013.
he chased the #1 rank on all the hard courts and killed his 2014 and 2015.
it is going to be very hard to come back this year and try to dominate the top guns. all he can do now is keep improving while keeping himself very healthy for 2016.
next injury ends the career.
so if he is wise he will go get on clay for practice and some match play after Wimbledon.
and try to minimize match play and practice on the hard courts after the u.s. open.
I would simply spend more time on clay to get that bullet proof ground game back.