"As incredibly professional as you’ve seen Rafa Nadal be or Roger Federer, where they’re competing and making sure that they’re going into Grand Slams mentally and physically the fittest, Djokovic has taken that to a level and it’s just amazing. He was incredible to watch at the US Open. If he’s got a practice court at one o’clock, he’s in the gym by 11 o’clock. He’s walking onto the practice court already sweating. He finishes his training, he’s into his drinks and his eating and everything is exactly in place where it needs to be. I haven’t seen a professional like that. There’s been a lot of amazing professionals but I’ve never seen the degree that Djokovic does it.”

(via Yahoo Sport Australia)