Real Zaragoza goalkeeper Esteban Andrada is facing severe punishment for punching an opponent in a heated derby match with Huesca in Spain's second division - after he had already been sent off.

The Argentine received a second yellow card for pushing over a Huesca player in stoppage time at the end of a fiery relegation battle.

He then sprinted towards Huesca captain Jorge Pulido and punched him in the face.

That led to a mass brawl, resulting in Huesca keeper Dani Jimenez and Zaragoza's Dani Tasende also being dismissed.

Andrada later issued an apology, saying he "lost focus" and will accept any punishment that comes his way.

Zaragoza also released a statement saying it "strongly condemns what happened" and will "take the appropriate disciplinary measures".

"We witnessed scenes unbecoming of this sport and which should never have occurred," the statement added.

"These events do not represent the values ??of Real Zaragoza or its fans, who throughout its history have been characterized by sportsmanship, courage, and respect for the opponent.

"We are role models and examples for many fans, especially children, who cheer us on at every match and aspire to one day become one of their idols.

"That is why these regrettable images should never have been seen."

Andrada, 35, who has four caps for Argentina, is on loan at Zaragoza from Mexican club Monterrey.

"The truth is I'm very, very sorry for what happened," he said.

"It's not a good image for the club, for the fans, and especially not for a professional like myself. So, I'm very sorry.

"Throughout my career, I've only had one red card, and that was for a handball outside the penalty area.

"I also want to apologize to Jorge Pulido because we are colleagues, and honestly, it was my fault, I lost focus at that moment, and well, I am here for whatever consequences the league may give me."

Huesca manager Jose Luis said after the game: "It's hard to explain. I think it's a complete loss of control.

"I can put myself in their shoes, given what was at stake and all. But it's unjustifiable.

"It's ugly. This was supposed to be a celebration of Aragonese football. I'd like people to talk about the match, even though it was ugly, with little play but a lot of hard work."

Oscar Sielva scored the only goal of the match as Huesca won 1-0. Both sides remain in the relegation zone with five games of the season remaining.

Zaragoza head coach David Navarro also apologised, adding: "There are lines we can't cross."