http://bleacherreport.com/articles/1001405-andy-murrays-problem-mental-or-physical Basically he has no killer shot. Low percentage 1st serve, a 2nd serve that actually gives his opponent an advantageous start to the rally (seriously, what a beyond awful 2nd serve). A notoriously un-natural forehand which can't go down the line, tries to hit a lot of spin cross-court like Nadal but nowhere near as effectively. Backhand is ok, but nothing on Djokovic's. Volleys are ok, but who volleys today? And if you do, you go in behind insane approach shots, which Murray can't do. Movement is a step behind Federer, Nadal and Djokovic, but I guess he is bigger than them. Mind you his extra size does not translate to a better serve, so he would be better off being smaller and more mobile. You add up all these weaknesses and is it any wonder why Murray can't perform at the last stage of slams? Even if he had the mental toughness of a non-Djokovic weakened prime Nadal, those weaknesses are too big a deficit to recover from. The article suggests Murray would have better luck if he developed a killer shot. But guess, what, if he had a killer shot it would be evident from the first day he picked up a racket. Killer shots can't be learned. That's why some players are more, y'know, talented? All in all, the 'mental' aspect of tennis is often over-played, especially with regards to Murray. Players should take a leaf out of Nadal's book - perform the same tactics over and over again on every single point, against every single opponent, in every single occasion. Like a robot. That takes any intangible out of the situation and makes for winning tennis.