Andy took the third set 6-1 for a two sets to one lead. Listening to the 5Live commentary - sounds like Berdych dropped his level somewhat but is now picking up again in the fourth set.
Currently 1-0* to Andy in the fourth, few deuces/break points in Berdy's first service game.
4th set was horrendous to watch but I suppose Andy deserves some credit for getting his level high enough to stay competitive once Berdych had awoken from his lengthy sleep. So many chances to get the double break in the 4th but kept fighting in the tiebreak to get through. I didn't enjoy that match at all.