An Atletico Madrid fan has filed a damage claim in a Spanish court against UEFA and English referee Mark Clattenburg, arguing that Real Madrid's goal in their 2016 Champions League final victory over his team should have been disallowed for offside.
Jose Antonio Campon, an Atletico member, is requesting €1,660 ($1,758) in compensation in a lawsuit presented on Thursday in a court in Leganes, Madrid.
Real won the game in Milan on penalties following a 1-1 draw after 120 minutes, but Clattenburg and his assistants had allowed Sergio Ramos' opening goal to stand when the defender appeared to be marginally offside.
According to the brief filed by Campon's lawyer, that goal "altered the competition, benefiting one of the two teams."
Campon's lawyer, Carlos Mendez, confirmed to ESPN FC that the claim is proceeding and said he expects "a definite ruling by the summer of 2017."
Speaking to AS, he added: "If you go to the cinema and there is no sound, you get your money back. This is the same.
"There are norms and they have been violated. That is why we are filing a claim against the employer [UEFA] and the employee [Clattenburg] as those responsible."
Mendez and his client hope the claim can bring about changes regarding the need of video technology to aid referees.
"The ultimate aim is to change the situation as we believe is common sense," Mendez said. "The technical means exists but are not put to the service of football."
Campon, who spent €160 ($169) on the ticket to the final and is seeking a further €1,500 ($1588) for moral damages, told AS: "We are suing the system in order for the technical means that exist to be applied and those are already in use in other sports.
"These mistakes are always to the detriment of the weak."
Campon blames UEFA "for failing to put all the means to comply with the regulation and choosing people [Clattenburg] who don't fulfil their duty as they should."
Mendez hopes the case will be admitted before the end of the year and that it sets a precedent in Europe.
"The amount that we are asking for is reasonable," he said. "If our claim is admitted, it will be applicable at European level and any spectator who is affected by a deceit can make a claim."
Mendez said Atletico are aware of their claim "but opted to stay out of it."
Mendez's legal firm, Mendez & Lopez de Toro, has also set up an email account for other Atletico fans who attended the final to join in the claim if they wish to do so.