He had 2 BPs to have a chance to serve it out, had plenty more BP chances and won more points.
In case you don't know not only is the serve as a legitimate shot as any it is the most important because it is the only shot that depends only on you.
those 2 bps? when nalbandian double faulted twice and sprayed another 2 UE's, ok sure.
on my screen nalbandian was winning most of the rallies through nice points, whilst almugro was hitting aces and finishing off cheap points all match.