This. Villas-Boas said yesterday he does not really focus on exact formations because everyone plays in such a way that they drift around. No set, fixed positions. Aguero would fit perfectly well with this, it's not like he's going to be told to stay there for the entire game. Of course he'll be encouraged to score goals, thus getting into such positions. It's not an exact science just because he's a striker, he's incapable of starting wide.