I wonder if we are going to see the "I'm going to blow him away from the off!" Andy, as per Raonic, or the "I'm going to take or set or so to get on top of him, then I'm going to blow him away!" as per Cilic.
Either way, Andy seems to have the winning mentality these days, and the ability to come from behind very strongly.
Andy in 3 or 4, depending on which of the above Andys turns up.
This match by and large will not be on Andys racket it will be quite even in that respect. It will depend on Andy's 1st serve % needs to be around 65% or above,Berdych attacks 2nd serves for fun.
Andy needs to get first strike in when Berdy misses first ball as well. As for the baseline rallies Berdy hits the ball with more pace than Andy, Nothing Andy can't handle however if Berdy gets big strike in first = point Berdy.
Andy will have to knock him off his rhythm and junkball him and then be agressive once he's move him around finishing points with big FH or at net. Berdy moves OK, but andy could really expose this if he gets his tactics right.
There is a chance though that Berdy has a crazy hot day and blows Andy off court. I think this is unlikely given the magnitude of the situation and the ability of andy to work things out in a match, in a B03 Berdy could pull it of but in a BO5 on HC Andy SHOULD pull through due to more consistancy and greater fitness. And let's not forget how BAD Federer played he really was shocking he gave Berdy a lot of help in that win, no way Andy gives away soo many cheap errors.