Costa Rican referee Juan Gabriel Calderón officiated the match between South Korea and the Czech Republic, which featured an unusual and widely circulated incident. Details of the specific incident were not provided in the source text, but it gained significant attention online, becoming a viral moment early in the World Cup tournament. Calderón was positioned close to the action when it occurred. The match itself marked one of the referee’s assignments during the competition. This event highlights the increased scrutiny and visibility of officials during major international sporting events like the World Cup. The incident’s virality underscores the role of social media in amplifying noteworthy moments from the tournament.