At the end of a pulsating contest in Saudi Arabia, Real Madrid scraped through 3-2 after extra-time and will now face either Atletico Madrid or Athletic Bilbao, who play on Thursday, in Sunday's final.
Hazard has endured a nightmare two years riddled with injuries since joining from Chelsea for 100 million euros ($115.9 million) and he stayed on the bench during Madrid's 2-1 win over Barcelona at Camp Nou on Sunday.
"I don't think there is a solution," said Koeman in a press conference on Tuesday. "For me it's a social problem, they are people who have an education problem, they don't know what morals and values are."
This was a victory that sent Madrid five points clear of their opponents, a healthy gap even at this early stage of a LaLiga season that has 29 games to go.
Real Madrid won their fourth straight game against Barcelona, 2-1 at Camp Nou, for their best streak in a Clasico in 56 years.
Barca have now lost a fourth consecutive Clasico for the first time since 1965 and drop to ninth in LaLiga, five points behind Madrid, who trail Real Sociedad by one.
Barcelona host Real Madrid in the first Clasico of the 2021-22 LaLiga season with both teams struggling to gather momentum.
Real Madrid travel to Barcelona for the first Clasico of the LaLiga season with both clubs struggling to keep momentum.
"As Barcelona coach you have to take the pressure, no problem. I know the importance of a Clasico," Ronald Koeman said ahead of the clash against Real Madrid.
The measure comes at a time when COVID-19 cases in Spain have dropped to their lowest level since July 2020.
Champions League: Real Madrid’s Lucas Vazquez to miss trip to Liverpool due to knee injury picked up in El Clasico
Real announced the player was suffering from a left knee ligament sprain with the Spanish media suggesting he could be out for the rest of the season.
LaLiga: Karim Benzema's record for fastest goal, Lionel Messi's prolific numbers and more records from El Clasico
Here are eight records that have defined this era of the El Clasico and the classic rivalry between Real Madrid and Barcelona.
Champions League: Ronald Koeman and Barca's sense of injustice clouds Juve test as blame game continues after Clasico loss
Barcelona are up next against Juventus on Wednesday, when another setback would not be irretrievable thanks to last week's 5-1 drubbing of Ferencvaros.
LaLiga: Real Madrid ease pressure on Zinedine Zidane with win over Barcelona in El Clasico; Atletico beat Betis
Barcelona might feel hard done by, especially as Ramos' penalty was awarded after a check by VAR and a hugely exaggerated fall by Madrid's captain after Clement Lenglet tugged his shirt.
Real Madrid won the first Clasico of 2020-21 LaLiga season 3-1 at an empty Camp Nou. It is Barcelona's second consecutive league defeat and a third straight winless game.
LaLiga: Sergio Ramos leads Real Madrid to victory over Barcelona as club bounces back from woeful run
Real Madrid lead the league with 13 points. Barcelona have seven with a game in hand.
Barcelona and Real Madrid come into 'El Clasico' a shadow of their previous unbeatable best. Both enter this fan-less spectacle hoping to avoid defeat than get all three points.
Zidane said Sergio Ramos will be available to face Barcelona after recovering from the knee injury that kept him out of the loss to Shakhtar on Wednesday.
Zinedine Zidane made four substitutions at half-time but could not spark a lethargic Madrid into life as his team fell 1-0 at home to newly-promoted Cadiz.
Casemiro's performance in the Clasico, to contain Lionel Messi, suggests the showing against Manchester City was only a blip for the remarkable player.