Real Madrid went into the Clásico on 25 October unhappy with the appointments of Juan Martinez Munuera as referee and Javier Iglesias Villanueva on VAR.
Al-Ahli won 4-1 against Al-Khaleej in round 11 of the Saudi Roshn Pro League, with Ivan Toney's opening goal confirmed after a lengthy VAR review.
Hansi Flick said he trusts the refereeing and wants to focus on Barcelona's preparation before the Clasico against Real Madrid at Camp Nou.
Fermín López spoke to RTVE before Barcelona's Clásico against Real Madrid, addressing the match, Madrid's threats, refereeing debate, his fitness and his Ballon d'Or choice.
Real Madrid's television channel aired a report before the Clasico at Spotify Camp Nou, alleging Barcelona receive more favourable refereeing treatment.
Barcelona host Real Madrid in the first Clasico of the season at Camp Nou, with disputes over Javier Tebas, referees and the Negreira case adding to the buildup.
Enric Masip, an adviser to Barcelona president Joan Laporta, criticised Real Madrid before Sunday's Clasico over references to the Negreira case.
Real Madrid supporters displayed a banner about the Negreira case during the second half against Leipzig, with chants lasting about five minutes.
