It may be strange, but Manchester City's performance was one of the best you'll see that ends in a 4-0 thrashing.
On his return to the Nou Camp, Pep Guardiola opted to fight fire with fire and got his side to play out from the back, urged them to resist the urge to drop deep and attack at speed. Indeed, by the end of the match, City only had two less shots on goal that Barcelona (10) despite Sergio Aguero's omission, their pass completion rate was only marginally worse at 82%, and they weren't far off parity in the possession stakes either.