Facundo Bernal has apologised for his sending-off against Barcelona, after the Real Betis midfielder aimed two headbutts at Lamine Yamal in the 54th minute.
Betis lost 5-2 at their La Cartuja home in a match drenched in refereeing controversy, with the Andalusian side also having a goal disallowed.
The newspaper Marca reported that Bernal wrote in a story on his Instagram account: "I want to apologise to my team-mates and to the Real Betis fans for leaving the team with ten men today. I am not used to reacting in this way, and I should have controlled myself in that moment. I take responsibility, and it will not happen again."
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According to the match report, Bernal grabbed Yamal by the neck and aimed two successive headbutts at his face during a confrontation between the players, with the ball out of play. Referee Ricardo de Burgos brandished the red card in his face. Yamal got a yellow.
Marca said: "The incident had begun after Fermin Lopez went down on the pitch before Abde Ezzalzouli's goal, with Lamine stepping in to defend his team-mate before falling victim to Bernal's assault."
Hector Bellerin confirmed that Bernal had apologised to his team-mates inside the dressing room. The Betis star said: "There is complete trust between us to talk about the mistakes and the achievements. We all make mistakes, and we have to put things right in the next match with a cool head and show the ambition and the energy that this team has."