As good a form as Murray is in, he has played so much tennis over the past few weeks including competitive doubles with his brother. Not saying Murray wont win, he should win on current form and if he plays as he has during the last events, nobody will touch him, but the tiredness may catch up with him.
I don't think fatigue is a good angle on Murray for this one. Being a top seed, he gets a bye and a couple days of rest after the final from the last tournament. Considering how easily he's been wining, his amount of time on-court during this stretch isn't very high either ... honestly, his training time would probably be heavier than the match time he's played over the past two weeks. Guy is fit as fukk and has a pretty simple draw to the semis.
you really think in this whole tournament theres not one match of +176 or better you can bet and immediately get paid for taking? while i agree that murray has the best chance to win this, you can probably bet him straight in the semifinals and finals and win at least 1.75 on the dollar.
the guys i named, tipsaravic, cilic, Nadal. there are lotsa guys who can fukk that +175 future in the A. not really a good bet.