In the same way it has effected Stan's game when he had the defensive role? I have to admit, Stan is no Pirlo, but damn he is a good player!
Eh, Petrov is a defensive midfielder though, put him more attacking and he's extremely average.
So it's the excact opposite IMO Petrov/Delph. All Petrov's best attributes are defensively, all Delph best attributes point to more attacking player.
Que? Petrov had a more attacking role at Celtic. My argument is valid.