Honestly thought City buying Donnarumma was a mistake, especially after they had already bought Trafford, but big time saves like that at the end are the difference between a title and not. Very much like a De Gea where his distribution is poor but goddamn can he save the ball.
He'd just won a Champions League, hard to call the signing a mistake. It's harsh on Trafford but hopefully he can kick on at another EPL team.