Andy says the match will be a tough one - he beat Simon in the Madrid Masters final, but Gilles was very tired from a lot of tough matches then. However, Andy does lead the H2H 2-1, with both wins coming this year - both in Masters Series, Madrid and Hamburg.
A break in the first game for Andy! Some extremely long rallies, with both players about even, but Murray able to take the cheap points with some monster returns on second serves.
I don't see why he should definitely be through - if Simon beats Stepanek in straights and Federer beats Murray in straights, Simon and Murray would be level on matches and sets (with Fed equal or better, assuming he beats Rad) - and Murray could end up with the worst games difference. This double-break's good in that respect, though.
Third consecutive game for Simon to bring it back to *4-3. Andy's got a fair bit to worry about here: cue some big serves, please.
I've been really impressed with Simon the last few weeks. From his passive final in Madrid he seems to have developed a lot more power in his groundstrokes.