Well he made it to the Aussie Open final without the old ball and chain, and according to the commentary last night, he's living it up in the single life of a tennis player (I read that as code for banging chicks), so I don't know if that's the problem here.
Andy Murray, manwhore. Love it!
But yeah, he didn't need Kim to make another Slam final and really I've always thought people overrate the impact a girlfriend/wife has on a players game. Plenty of players on tour have wives/girlfriends and they don't have a fraction of Andy's results.