Valencia CF became the new unofficial world champion after defeating Athletic Club in San Mamés. The team leads the curious historical line of the Unofficial Football Club Championship. The Valencia CF won the match 0-1, with a goal from Umar Sadiq in the 72nd minute, which makes it the new linear champion of club football according to the logic of the Unofficial Football Club Championship. The explanation has something to do with boxing: the title is not won in a final, but by defeating the team that holds it. The UFCC system establishes that if a club defeats the current champion in its next official match, it inherits the crown; in case of a draw, the champion retains it. The historical chain starts from the first FA Cup match with a goal (Upton Park 0-3 Clapham Rovers), in the 19th century, and since then the "belt" has been changing hands by leagues, cups, and international competitions. According to this system, the year 2026 started with Arsenal as the unofficial world champion. The Arteta team held the world belt for nearly a month, until it was defeated by Manchester United. Five games later, Newcastle took the title. From the Urracas, it passed to Manchester City and from Pep Guardiola's team to Real Madrid, after the white victory in the first leg of the Champions League playoffs. And from there, the world champion settled in LaLiga. The Arbeloa team was winning and drawing games until its 2-1 defeat against Mallorca. From Mallorca, it passed to the hands of Alavés after the victory of the babazorros against the bermellones and from Vitoria it traveled to Bilbao last week after the 2-4 for Ernesto Valverde's team. With the Valencia 0-1 win in San Mamés, the Mestalla team is the new Unofficial World Champion of Clubs. The paradox is evident: the official FIFA Club World Champion remains Chelsea, winner of PSG 3-0 in the 2025 final, but Valencia can now boast another title, without ceremony or federative recognition, which feeds the most romantic and statistical part of football. The next chapter of this story will arrive on Thursday, May 14, when Valencia will receive Rayo Vallecano in Mestalla. If they win or draw, they will conserve the peculiar belt; if they lose, the new unofficial champion will be the Madrid team.