Antonio Valencia has vowed to end the season on a winning note for "super coach" Sir Alex Ferguson in an interview with The Sun.
Ferguson, who announced his retirement midweek, will be replaced by Everton manager David Moyes next season.
Valencia admits he has struggled to recreate his best form this campaign, but believes the emotion of Ferguson's final match at Old Trafford on Sunday against Swansea will lift he and the entire United squad.
"I never thought this moment would arrive," Valencia told The Sun. "It never seemed real to me that Sir Alex would actually leave.
"It's going to be a very emotional day and the boss will merit every cheer from the fans. We want to dedicate a victory to him on what will be a great day in Old Trafford history.
"What Sir Alex has achieved in 27 years will never be repeated. I have been very happy to work for a super coach - the best in the world - and I am tremendously happy to have had the chance to win titles under him. Without him, that wouldn't have been possible.
"And after some grave injuries Sir Alex was decisive in my recovery in that he restored and raised my morale. Privately, he told me how much United needed me and that vote of confidence was the key to my rehab.
"But I shall also always remember his anger in the dressing room after a bad game. He is normally positive but often he'd be critical of us even after victories by two or three goals.
"Against that, he would often appear with a long face and look as though he was lining up an intimate moment - and deceive us with his jokes!
"Today, though, the dressing room is very sad he is leaving. We didn't see this coming but it is fair to say the boss became more serious after we won the Premier League title again.
"It's not just the length of time Sir Alex has been manager or the number of trophies he has won. It's also the way he worked with the players. He is incredible - as I say, the very best. Totally unique."
The match will also be Paul Scholes' last at home after he confirmed he will retire at season's end.