2013 will be a crucial year for Murray. Since Djokovic has been mentally affected by Nadal's uprising (Roland Garros 2012, double-faulted on match point, lost the mental battle), and Federer isn't in contention for slams anymore, it'll be interesting to see if Murray can make it to his first French Open final. And then the pressure will be on Murray again- can he perform better than Federer vs Nadal and/or Djokovic vs Nadal? I think if Murray can win more than 18 games (unlikely), Murray will see this as a success, and may give him confidence for Wimbledon 2013/US Open 2013.