Villarreal have confirmed that a supporter has been given a lifetime ban for throwing a banana at Barcelona defender Dani Alves during Sunday's clash.
The alleged racist attack occurred while Alves was lining up to take a corner, but the Brazilian has received praise for taking a bite out of the fruit in response.
A statement from the Spanish club said: "Villarreal CF wants to communicate that the club deeply regrets and condemns the incident that happened yesterday during the match against FC Barcelona in which a fan threw an object onto the field of El Madrigal.
"Thanks to the security forces and the invaluable assistance of the Yellow crowd, the club has already identified the author and has decided to withdraw his season tickets, permanently banning his access to El Madrigal stadium."
Barcelona eventually went on to clinch a 3-2 victory.