Berdych's flat shots can hit through Olderer's defense - plus Berdych returns Olderer's first serve well and annihilates his second, that effectively means Olderer starts FS rallies on neutral and second serve rallies immediately under attack. Berdych also does not fear to finish points at the net and has good serve himself,which makes it hard for Olderer's joke return to break him.
TSD with some semi insightful comments? Am I dreaming?
But yeah he just hits it hard and flat, and goes after the second serve. I can see it being one sided if Fed can get the first set and the early break in the second.