[nikcub]

If I were to rank the attributes that changed him the most, it would be:

1. Confidence

2. Diet

3. Skills

he used to be depressed about playing the same era as Federer / Nadal but he realized late last year that he can beat these guys, and has rarely set a foot wrong since. The diet helped build his stamina, but most of the games this year stamina hasn't played a part (I would say the final in Miami was an exception).

he always had the skills - before this streak he was able to beat Nadal and Federer. I think it just came down to being confident enough to knowing he can do it all the time. He is also tactically the most brilliant player I have ever seen, but that has always been the case as well.

In short he stopped being a bitch