Mohamed Elneny, that's who.
He'd be an absolute star at West Brom or Southampton.
In fairness Mkhitaryan was having a bit of a shocker at that point; he was looking decidedly lightweight, like a player newly arrived in English football who can't quite believe the intensity of every challenge.
Quite how Atkinson failed to give a penalty and a red card when thon bloke tried to snap some Armenian ankle is a mystery to me.