The Red Devils finished a fourth straight season without a trophy after defeat to their La Liga opponent in Poland
Manchester United head coach Ole Gunnar Solskjaer admitted that his side "didn't turn up" in their Europa League final loss to Villarreal on Wednesday.
The Spanish side opened the scoring through Gerard Moreno in the first half before Edinson Cavani equalised on 55 minutes in Gdansk.
The final would go to a penalty shoot-out where both teams sensationally converted their first 10 chances, before United goalkeeper David de Gea saw his spot-kick saved to give Villarreal the trophy.