Alejandro Hernandez Hernandez is a referee with a big reputation

Alejandro Hernandez Hernandez is considered as a very good referee by the Spanish FA's technical committee of referees.

The 37-year-old, who will be in charge for Wednesday's Clasico, has all the necessary badges and qualifications from FIFA and UEFA to be considered as a top-level official.

He's recognised as one of the best referees in Spain alongside Antonio Mateu Lahoz and Carlos del Cerro Grande.

Hernandez Hernandez became a top-flight referee in the summer of 2012 and took charge of his first Clasico in April 2016.

In 2017, he was named the best Spanish referee by the technical committee of referees.

He has spoken to MARCA before about what it means to referee a Clasico.

"For me, it's a privilege to be involved in this match, maybe the most important one in the world at club level," he said.

"Refereeing these players, the atmosphere, the stadium..."

Hernandez Hernandez, who is a triathlete himself, was the man in charge when Barcelona weren't awarded a goal against Real Betis when it had clearly crossed the line in 2017.

"When you realise you've made a mistake, you feel bad," he said then.

"I went home angry, like any athlete.

"It was the error with the most repercussion in the media in my whole professional career."

Hernandez Hernandez isn't majorly popular with Real Madrid fans either, as he's sent off Sergio Ramos and disallowed a Gareth Bale goal in previous Clasicos.

He has taken charge of 10 matches in LaLiga Santander this season, averaging 5.63 yellow cards and 0.25 red cards per game.

Ricardo de Burgos Bengoetxea will be the man in charge of VAR for El Clasico.