Erik ten Hag claims Marcus Rashford - and his fellow injury returnees - are "available" having travelled to Sevilla.
Manchester United are looking to book their spot in the last four of the Europa League in Spain and have been boosted by the return of several players. Rashford is among the most crucial given his record-breaking season and the English forward is in the mix to start.
United know they need a win having surrendered their first-leg lead to draw 2-2. Rashford has been their main supply of goals this term and Ten Hag is ready to make a late call on the striker, who is closing in on the 30-goal mark for the first time.
The Dutchman said on the likes of Rashford, Luke Shaw and Marcel Sabitzer: ''They are available because that's why they are on the aeroplane. But I will make my decisions tomorrow as today we were training and I will see what the reaction is. Tomorrow we will make the decision.''
United shipped two own goals, one in the final minutes, to allow Sevilla back into the contest. The Red Devils have never beaten the Spanish side, who've twice downed them in Europe recently, and must end that record if they are to keep their cup treble alive.
Already they've claimed the Carabao Cup but can add the FA Cup and the Europa League, which would represent a successful first season under Ten Hag. The United boss is confident in their defensive side and is now hopeful that, with Rashford returning, they can be prolific in the final third.
He said: ''I think defensively we are good, we have the most clean sheets in the Premier League so our organisation all over the pitch is quite good. Attacking, yeah we should have scored more goals during the whole season but I am confident as, especially in the last few games, now we have all the players on board, we score in every game. So I am confident we can do that tomorrow as well.''
FA Cup success would need them to first overcome Brighton in the last four this weekend. The Seagulls have been among the best performing sides in the top flight this term, beating United at Old Trafford on the opening weekend. Manchester City are expected to make the final, which could present the Red Devils with a chance to scupper their treble hopes.
Ten Hag though has said: ''We think about our games and winning our games, we are not thinking or dealing with that. We have to improve our game and win our game and our next game. We don't get distracted by issues like that, we have to win our game and with every game we want to become better. We want to compete with the best but therefore we have to progress and we know we have to progress even more.''