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Sevilla were 2-0 winners at home against Barca in the first leg of the semi-final last month and would have been feeling pretty good about themselves.
That feeling was clearly multiplied as they watched their rivals get beaten by PSG in the first leg of the Champions League last 16, with Kylian Mbappe scoring a hat-trick.
During the match Gerard Pique failed to keep up with Mbappe, tried to catch him by holding his shirt, a moment that instantly became a meme and Sevilla did their own, making fun of the fact they usually win the Europa League.
Clearly Barca's social media team hadn't forgotten the tweet from two weeks ago and got their own back, as Ronald Koeman's side overturned the visitors' two goal lead on Wednesday.
Aptly it was Pique who scored a last minute equaliser that took the game to extra time and, after Martin Braithwaite's winner in the added 30 minutes, the Twitter admin responded in kind to Sevilla.
The win, helped by Ousmane Dembele's early stunner in the first half, took Ronald Koeman's side to their ninth Copa del Rey final in 11 years.
With the second leg of the PSG unlikely to provide the same kind of comeback and the Catalan giants still five points behind Atletico Madrid in La Liga, with the league leaders still having a game in hand, the Spanish cup is their best chance of silverware this season.
It was a much needed win in general for Barca, as it's been a pretty tumultuous time for them both on and off the pitch recently.
Earlier in the week former club president Josep Maria Bartomeu was arrested following a police raid at the club's offices.
The club are currently in the process of voting for a new president, and there's hope that the right man could keep Lionel Messi at the Nou Camp.
Legal services director Oscar Grau and Roman Gomez Ponti were arrested, too.
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