There was a moment in the second half yesterday where Aguero got himself in front of the Chelsea back 4 but by time he got his shot off they had recovered. Two or Three seasons ago no defender in the world would be getting back at Kun.
I think Aguero's edge has been blunted to a degree by playing every game as a sole striker. He's obviously played that role in the past with devastating effect. But he's also mixed it up by frequently playing in a pair with the likes of Dzeko, Tevez etc (even Bony!). It seemed to me that those outings helped his game, kept him sharp. Its a tough ask for a little man to play repeatedly as a single stiker in the PL against packed defences.