IMO the Aguero goal wasn't as easy to save as most have said, as well as there being the wicked dip on the shot just before it reached Pepe, there also a very slight turn inwards before that, meaning not only did it divert under his body but also away from his gloves.
I think Dirk deserves an awful lot more criticism for the goal, what he did was criminal, think he was trying to flick it through a City players legs, one of his many moves he often tries that never work, along with his flick down the touchline that always smacks straight into the fullback.