Amorim’s system means United are often outnumbered in the middle of the park against three-man midfields. Whatever partnership plays there needs the legs to cover space, laterally as well as up and down. Mainoo and Ugarte give United exactly that.

Liverpools leaky right-hand side has been targeted by opposition teams at Anfield; the last six goals they have conceded at home have all been created down the left; Trent Alexander-Arnold has often b