Villarreal president Fernando Roig was furious after their 3-2 defeat to Real Madrid.
Real's victory over Villarreal came via several controversial decisions, including a penalty for handball.
Roig spoke to Radio Cope, barking: "(Referee) Gil Manzano and his assistants have left the stadium with bags from Real Madrid. That's not good, it seems to me.
"I think after a penalty, which has not been, we can not talk about a comeback from Real Madrid.
"Everyone says the handball was a rebound, but a rebound is not a penalty."