Manchester United survived a sizeable scare to reach their first Europa League final after a nervy 1-1 draw with Celta Vigo on Thursday completed a 2-1 aggregate victory.
Jose Mourinho's side will play a youthful Ajax team in the final at Stockholm's Friends Arena on May 24, when they can complete their trophy collection and perhaps more importantly book a place in next season's Champions League.
Ajax advanced to their first European final in 21 years despite a 3-1 defeat to Lyon in France, the Dutch side progressing 5-4 on aggregate.
Marouane Fellaini's 17th-minute header put United 2-0 up on aggregate, but Celta hit back late on through Facundo Roncaglia, who was then sent off along with United's Eric Bailly following a centre-circle shoving contest.
"We suffered until the end and it was open until the last second," United manager Mourinho told BT Sport.
"After 14 matches we are in the final. If we win the Europa League I am more than happy. It would be amazing."
Mourinho will have to do without influential centre-back Bailly, whose suspension leaves Chris Smalling, Phil Jones and Daley Blind as United's only available central defenders.
With Mourinho having publicly abandoned hope of a top-four finish in the Premier League, after his side fell four points off the Champions League berths, United's season would have effectively been over had they gone out.
Instead they have a chance to add a second big trophy to the League Cup won in February and allow Mourinho to end a complicated maiden campaign as manager by winning the fourth major European honour of his career.
Appearing in their first European semi-final, Eduardo Berizzo's Celta gave United several uncomfortable moments and there was panic in the hosts' box during the fraught closing stages.
Both managers reverted to the teams that had started last week's first leg, which meant a United return for Paul Pogba, whose world-record transfer from Juventus is being investigated by Fifa.
United started shakily, with Blind looking particularly uncertain, and there were early murmurs of concern around Old Trafford when Iago Aspas cut in from the right and obliged Sergio Romero to tip his rasping shot over.