IMO it's looking that way. He can't beat Nadal on clay or grass, played out of his mind to beat Federer at the 2008 AO but is a mental midget against him in slams otherwise, Murray has turned the tables on him lately, and he's beginning to pop out excuses like his compatriot Jankovic. His conditioning looks like it will be an on-going issue and he looks the most likely of the top 4 to get knocked out of a slam via a major upset (Safin, Kohlschreiber...wtf?!?!). He is in the prime of his career but appears to have either hit a slump or perhaps already has peaked. What's your take?