The Reds go into the Old Trafford tie looking to get the job done and reach the quarter-finals, following the 1-1 draw at the Reale Arena last week.
There was welcome news in training with midfielders Mason Mount and Manuel Ugarte taking part, but Leny Yoro was missing, after he failed to reappear for the second half of the 1-1 draw against Arsenal, and Amorim disclosed concern over a foot injury in the post-match press conference on Sunday.
"Mason Mount is too soon," confirmed Ruben at Carrington. "Leny [Yoro] is out. Harry Maguire cannot play this one.