many good points here from CD and Swish. Djokovic became a monster and he still so driven ... I really respect that.
Fed is slowing down, it's normal. I still think he is more than capable of winning another Wimbledon.
As Swish said, Murray is a wild card. you never know with him. now with a healthy Nadal I think he'll be in trouble if those two meet on grass or even on HC. Nadal is a bad match up for Murray.
Nadal, IMHO will be #2 soon if he stays healthy. His only problem is Djokovic. He can handle anybody else just fine.
Djokovic is very hungry, that title at MC has driven him and now he smells blood in the water.
He'll fight like a wild dog from now on.
Nadal has to keep his position on clay, without that he has little else.
This should get interesting going forward.