Romelu Lukaku could be restricted to a place on the bench when Manchester United face Chelsea in the FA Cup final next weekend.
Belgium striker Lukaku suffered an ankle injury during last month's 2-1 win over Arsenal and has sat out United's past two Premier League matches.
Mourinho's men failed to score on either of their trips to Brighton and Hove Albion and West Ham, underlining the 24-year-old's importance to the cause following 27 goals across all competitions in his first season at Old Trafford.
"We hope he can play in the final,” Mourinho told reporters, with Lukaku certain to miss Sunday's Premier League curtain call versus Watford.