Watching him against Nalbandian, I couldn't help notice that he's much mroe rounded down there in previous years. Extra work in the gym? Ageing? He hasn't filled out much in his legs, arms, chest or neck, but he's got much more curvature going on round the back....
I think we need photographic evidence to judge accurately.
It's not just his ass, everything about Juanqui is perfect this week. His game, his face looks less tired and more sexy again and his abs are completely defined. He must have really worked hard during the off season on diet and fitness.