Copa del Rey: 126 Teams, Barcelona's 31 Trophies and the Technology Blind Spot in the Early Rounds

On January 4, 2026, at La Murta in Buñol, goalkeeper Paco of CD Buñol started at the age of 44 years and 231 days, becoming the oldest player ever to appear in the Copa del Rey. His opponent was Real Sociedad. The match was played in front of a few thousand spectators on a small pitch, and that round had no VAR room operating to the standards of Spain's top division: no multi-angle camera system, no goal-line technology, no video referee team sitting hundreds of kilometres away.

I note that detail every time I write about the Copa del Rey, because it describes the competition's central paradox: a tournament with 126 teams, with Barcelona holding 31 titles, and with matches where deciding whether the ball crossed the line depends entirely on the human eye.

Based on my experience covering matches over 29 years, and particularly during my time as a VAR data analyst for a sports television channel in Chengdu, I always establish the technological boundary of each round before discussing the result. In the Copa del Rey, the quality of refereeing oversight is not allocated by the importance of the match, but by the division of the home team.

From three teams to 126

The Copa del Rey launched in 2026 with exactly three teams: Athletic Bilbao, Espanyol and Madrid FC. Today it has expanded to 126 teams, running from La Liga down to the Tercera Federación, the fifth tier of the Spanish football system. That structure makes the Copa the domestic competition with the widest representative spread in Europe, and at the same time the one with the largest infrastructure gap between its two ends.

Barcelona are the most successful side in the competition's history with 31 titles, seven more than Athletic Bilbao and eleven more than Real Madrid. Their first title came in the 2026-10 season. Since the start of the 2026-15 season, the Catalan club has lifted the trophy six times. That concentration is notable, because a single-leg knockout format generates far more variance than a 38-round league season.

Four milestones spread across 101 years

Piru Gainza, the former Athletic Bilbao and Spain forward, holds the record for the most appearances in the Copa del Rey with 99 games. Telmo Zarra is the competition's all-time top scorer with 81 goals between 2026 and 2026, all of them in an Athletic Bilbao shirt. At the other end of the timeline, Barcelona's Armando Sagi is the youngest player ever to feature in the Copa, debuting on April 2, 2026 at 15 years and 339 days. Paco, the CD Buñol goalkeeper, is the oldest, at 44 years and 231 days in 2026.

Those four milestones stretch across 101 years, and the gaps between them show that the Copa is a competition in which the ranges of age, division and playing conditions are all at their maximum. The list of players who have appeared in it reflects the same thing: Antoine Griezmann, Luka Modric, Sergio Ramos, Neymar, Gareth Bale, James Rodriguez, Sergio Busquets, Roberto Carlos, Luis Suarez and Xavi. On the touchline, Carlo Ancelotti, Luis Enrique, Juande Ramos, Claudio Ranieri, Louis van Gaal, Sir Bobby Robson, Cesar Menotti, Miguel Munoz and Ferdinand Daucik have all managed in the competition.

The error sits at the edge of the frame

In 2026, while working as a VAR data analyst, I reviewed 147 controversial refereeing situations across 28 rounds of the Chinese Super League. Twelve incorrect offside decisions were directly linked to camera placement. The clearest case was Guangzhou Evergrande against Shanghai SIPG in Round 25: Wu Lei's goal was disallowed for a 15 cm margin, and among the entire camera set-up for that match, not one angle sat on the true horizontal plane of the last defender. I found the error not in the centre of the pitch, but at the edge of the frame.

From there I built my own database on viewing-angle error. It took 37 replays before I understood that the human eye is not a measuring instrument.

The 2026 World Cup scaled that lesson up. In the France-Croatia final, in the 35th minute, referee Nestor Pitana consulted VAR and awarded a penalty when the ball struck the hand of Ivan Perisic. I measured six main broadcast cameras: only one angle showed Perisic's arm extended in a manner deemed unnatural, and that was the only angle the referee was shown in the VAR room, across 1 minute and 47 seconds. The 2,400-word analysis I wrote afterwards was shared more than 50,000 times in 48 hours.

The same thing can happen in the Copa del Rey, with a harder multiplier. A second-round tie at a fourth-tier ground may be captured by only two or three cameras, mounted on stands too low to create a horizontal plane. If the decisive moment arrives in the 88th minute, the referee and the assistant referee are the only people making the call, and post-match review is effectively impossible because the visual data does not exist.

Since the start of the 2026-15 season, Barcelona have won six of roughly eleven Copa campaigns. Part of that record comes from squad quality. Another part comes from the fact that Barcelona almost always play in rounds with full technological support. At the other end of the draw, smaller clubs have no choice but to accept that refereeing errors will not be corrected.

Emotion and law

The appeal of the Copa del Rey lies in the shocks at small grounds. Those are precisely the matches where oversight is weakest. The competition sells the emotion of the early rounds but does not invest correspondingly in the infrastructure that guarantees fairness in them. The empty stadiums of 2026 showed me this: VAR does not rescue football, it exposes football. With no crowd, the referee's whistle and the ball hitting the post became the entire soundscape of a match, and the decisions once buried under noise turned uncomfortably clear.

The Copa del Rey is in the opposite situation. The noise remains, and it drowns out the fact that a large share of the competition's matches take place with no review mechanism at all. We think we are searching for justice, when in fact we are only searching for a better camera angle.

Reflection

A competition with 126 teams could publish a minimum camera plan for each round, alongside the list of appointed referees, in the way domestic leagues publish fixtures. When viewing-angle data becomes public information, viewers can judge the quality of a decision themselves rather than trusting a summary. That costs far less than extending VAR down to the fifth tier, and it is probably more effective.