How Brilliant Is Sergio Aguero?

It's just one game and against newly promoted Swansea, but in just a half hour on the pitch, Manchester City's new striker scored twice - one a poacher's goal, the other a brilliant strike from distance - and added a superb assist in Man City's 4-0 victory. Already in possession of a deep and power-packed squad, I don't know why Roberto Mancini is so determined to coax Arsenal's Samir Nasri to City, unless it is the old Chelsea ploy of signing players just to weaken your opponents.