Sevilla management were fuming after defeat at Barcelona on Saturday night.
Barca won 3-2 thanks to Alexis Sanchez's injury time winner, while Sevilla had a clear goal for Ivan Rakitic chalked off for offside.
Sevilla sporting director Monchi tweeted: "Forget disgust, it's worse than that. Come on Sevilla, you are the greatest".
Sevilla vice-president José Castro also snapped: "I don't know why the ref disallowed the goal. It's a shame. It's not easy to create that many chances at a ground like this one, yet we're still going away empty-handed. I think we could even have won."
