Keeper was too slow to react, like he wasn't expecting Dzeko to leggo de lion.. He will be telling himself he coulda done better with that.
First goal too, it was a great delivery into the box.. But even if De Gea wasn't going to get there he could still come hard enough he might have put off Lescott.
He will have to learn to be aggressive on aerial balls in this league and he will have to learn fast.