I don't think he will do it, mainly because of wimbledon. No idea how and why he won in 2011, but I don't think Djokovic is good enough to win wimbledon again. I see Federer, Murray and probably even others like Tsonga and Del Potro better than him. The ranking at the olympics represent my point of view of wimbledon.
eurotrip - 10'000km in 21 days through 28 cities