I think there is one last run at a slam left in him. and maybe even 2 runs at slams.
but he will have to reclaim his fitness and his physicality to pull it off.
any other way would require a lot of luck.
right now I am just thinking survival in terms of injuries. lets hope there are zero injuries in 2015 and that he comes back to do major damage in 2016 and captures 2 slams.
and then he should be ready to sail into the sunset.
but it will require an immense work ethic and staggering hunger to capture a couple of more slams.
that should be his goal right now. reclaim his fitness and his physical strength and go after 2 more slams.
one RG and one Wimbledon. both are soft surfaces. and natural surfaces of course.