As reported by the Daily Mail, Mourinho is concerned that Lukaku could further aggravate the injury ahead of United's crucial Premier League match against Liverpool, a game which he will be desperate to have the former Everton man fully fit for.
There is an uncertainity surrounding Michael Carrick too which means the club will be with only Ander Hererra and Nemanja Matic in midfield.
"I don't think the state of the pitch played any part and it was just a collision between two strong players who wanted to win the ball".
No wonder Manchester United fans rate Marouane Fellaini so highly!
"Paul is very important for Manchester United but we also have great players to play instead of him".