Juventus boss Max Allegri admits Marouane Fellaini made the difference for Manchester United on Wednesday night in Turin.

Fellaini was then thrown into action from the bench, and helped spark United's turnaround, as they bagged two goals in the dying minutes to win the Champions League tie 2-1.

Allegri said: "They didn't have Felliani in the first leg and tonight they had him and he made an important contribution.

"It's simple, the fact that he is 190 centimetres tall and strong on the header.

"The team played well in defence, as we didn't concede much and created a lot, and were aware of the difficulties of Fellaini coming on and there was the two free-kicks, and from the negative we have to find the positive."