Del Potro is twice the player Isner can ever aspire to be.
Isner has a much better serve obviously (and volleys), but that's it. His ground strokes aren't better at all. His movement either. And JDMP is much stronger mentally and smarter.
Djokovic was done after the USO. He went like 6-4 after that.
2011 was his best season because of what he did from January to September.
Murray is the only one of the TOP 4 that Ferrer has a chance against. Berdych beats Federer regularly, Ferrer couldn't even beat him once. And even if TB...