United maintained their lead at the end of the game, meaning they are through to the final.
Celta Vigo started very brightly with former Liverpool failure, Iago Aspas causing problems for United down the right side and pulling off a curling effort which had to be saved by Sergio Romero.
However, United kept believing and scored when Marcus Rashford floated a cross in, which Fellaini diverted to Alvarez’s post, a saveable effort which the keeper made a mess of – and granted Fellaini with his first goal in European football.
With Celta Vigo definitely in need of a goal, their manager, Eduardo Berizzo sent on Jozabed, a Fulham player on loan, who impressed in the second half and came close with a long-range effort.
The Spanish side were building attacks well, but couldn’t find a breakthrough until Roncaglia fired a header out of Romero’s reach with six minutes to go and suddenly there was still hope for Vigo.
A massive brawl at the end highlighted United’s frustration about the goal, and in the mess Bailly and the goalscorer, Roncaglia both got red cards and there were a few players who were lucky they didn’t get disciplined too.
United managed to hang on, and when Guidetti couldn’t sort his feet out to guide the ball into an unguarded net with six seconds to go, it surely made both pair of fans and players miss a beat.
United will now play Ajax in the final on the 24th of May and hope to win the Europa League for the first time in their history