hard work will fix some of the issues but absolutely nothing can be accomplished with the drastically reduced fitness levels and the significantly diminished physicality he is bringing to the battlefield right now.
there is plenty of inspiration to be had from the likes of djokovic, murray, and Federer.
and then there is serena. all these players are working harder than ever before on their fitness. they are also doing more physical work in the gym than ever before.
if you cant win then you start looking at the winners and see what they are doing and how they are doing it.