Not a huge tennis fan but watching this morning, isn't it Murray's emotional hold (or lack of) of a game/opponent his major weakness? I know he never gave up the game but he seems to go through spells where he just thinks (maybe even said a few times i thought) 'f*** it, it's gone', or words to that extent. He seems like his biggest enemy sometimes. Unlucky to play at the same time as maybe the 2 greatest ever though!