The Brazilian striker has been struggling with a hamstring injury and was a major doubt for the last 16 return-leg tie. But it remains to be seen whether he could be fit to play at Old Trafford.

Pato hit 12 goals in the Serie A and two in the Champions League as Milan heavily rely on his presence upfront.

The Rossoneri need to overturn their 3-2 trailing to the English champions, following a home defeat in the first leg two weeks ago.