really? when City's only league defeat came at Anfield, then how do you suppose City would underestimate Liverpool at Anfield?
anfield atmosphere intimidated the boys and top of that, 2 of pep's tactics for the match backfired horribly. 1 early City goal at etihad and things could all change.
not saying city is on the level of barcelona and surely liverpool is better than psg, still, neither did barcelona have an away goal last season when they lost 0-4 and then came back to win 6-1.