Villarreal are through to the Europa league final after holding their nerves to draw 0-0 with Arsenal at the Emirates and proceed on a 2-1 on aggregate score.
It was a special night visiting manager Unai Emery returned to haunt the London club that sacked him in 2019.
The Yellow Submarine had lost their four previous European semifinals, one to Arsenal in the 2005-06 Champions League, protected their first-leg advantage with a disciplined display throughout the game.
They will now play Manchester United in the 26 May final in Gdansk in what will be the biggest night in their history.
Arsenal meanwhile face the prospect of having no European football next season for the first time in 25 years something boss Mikel Arteta says is disappointing.
Before the match the Gunners boss said that this was the perfect opportunity for the Gunners to salvage something for its fans but the overall performance on the night summarised Arsenal’s season.
The match started rather slowly with both sides not showing any attacking threat. The first real chance of the match came in the 25th minute when Arsenal skipper Pierre-Emerick Aubameyang hit the upright with a low drive.The Gabonese then went even closer after the break when his header from Hector Bellerin's cross hit the inside of the post and somehow did not spin across the line.
A disappointing result it was and Mikel Arteta was left scratching his head after the final whistle.
"We are devastated, really disappointed," said Arsenal boss Mikel Arteta, who was dealt a blow in the warm-up when Swiss midfielder Granit Xhaka was injured and had to be replaced by full back Kieran Tierney.
"But we congratulate Villarreal. We created enough chances over the two ties."
On the contrast, the Spanish side were calm and composed in possession and might have put the tie to bed had Gerard Moreno made more of a glorious chance early in the second half instead of shooting straight at Arsenal goalkeeper Bernd Leno. They were also made to make an early change when Samuel Chukwueze was stretched off the pitch injured.
This was not only a sweet moment for Emery, but also for Villarreal, who were beaten by Arsenal in the Champions League semi-finals in 2006 and quarter-finals three years later, and now, finally, have their revenge.