Pereyra can play there, i dont know what youre taking about. are you saying he can play AM in a 4312 but cant play in a 4321? also, as i said, we would need someone better than him who would be ahead of in rotation behind Sanchez and Dybala. lets say its Bernardeschi for example. so Sanchez-Dybala would start and Bernardeschi would be 1st choice sub for either of them, only then comes Pereyra. also, if one of these 3 is unavailable, its unlikely we would play the 4321 vs top opponents, we would rather go with 352 or 4312 is my guess