At the 2026 World Cup, football is no longer judged only by the referee’s eyes, as Human-Computer Interaction (HCI) including FIFA football VAR, AI avatars, connected ball sensors, RefCam, and tracking systems turn every goal, foul, and offside call into a data-led decision for millions watching.
FIFA football VAR (video assistant referee) technology may make football more accurate, but it also changes who feels in control. Referees still make the final call, yet the game now pauses for screens, sensors, and invisible touches that fans cannot always see.
So, it’s not just a mere question of whether AI precision protects football, or whether it drains the sport of legacy, emotion, and human rhythm.
The Ball that Overruled the Eye
On Friday, July 3, during the Croatia VS Portugal match, the celebratory roars last around four minutes, long enough to feel real, but short enough reversal even more cruel. And the FIFA football VAR was the main antagonist for the Croatian fans in the Toronto stadium.
Croatian defender, Joško Gvardiol’s bundled finish in the 13th minute of stoppage time send the Croatian fans into a kind of collective delirium your usually see in football tournament but is rarely sustained.
What reversed the results of Gvardiol’s finish was not a second look at the television relay – showed nothing conclusive – not a conversation between officials on the pitch, but a number of AI generated algorithmic behaviors inside the match ball itself.
The VAR FIFA world cup checked the buildup. Shortly after, Referee Espen Eskås went to the monitor.
When Croatia thought number 24, Joško Gvardiol had scored a late equalizer against Portugal in Toronto, celebrations came, followed by the reality crushing AI capabilities.
The Connected Ball Technology (CBT), under the FIFA football VAR integration, was implemented for this exact kind of moment, operating through an Inertial Measurement Unit (IMU) embedded in the official Adidas Trionda.
Advantages of VAT football technology is that the 2026 FIFA ball sensor runs at 500 hertz (Hz) – around 500 data points per second, capturing the ball’s trajectory information at such a clean resolution that human perception cannot approach, and multiple angle broadcast cameras cannot replicate.
Croatia’s Mario Pašalić was offside because the ball had taken the smallest touch off teammate Igor Matanović before reaching him. That touch was detected by connected ball technology inside Adidas’s Trionda match ball.
The goal was ruled out due to the controversial FIFA football VAR review.
Technology has brough some kind of alien synergy between football and VAR where the referee, during the Croatia BVS Portugal match managed to track acceleration and movement changes in three dimensions, where AI sent real-time touch data to the video operations room.
According to FIFA, Adidas Trionda ball’s sensor was “capable of determining any slight contact … allowing officials an unprecedented level of data to make fast, accurate decisions.”
To Portugal, the football and VAR decision was clean. To Croatia, it felt brutal. Coach Zlatko Dalić said VAR had gone too far, seeing as a technology that “kills the emotions. It kills everything within you,” Dalić expressed, adding, “it kills what you are experiencing and then brings you back to the beginning.”
Portugal manager Roberto Martínez saw the same moment differently, saying after the game ended that “the message is very clear, […] The balls now have a chip, and it’s very clear that’s why the VAR intervened. It’s not a subjective opinion.”
That is the heart of the 2026 World Cup’s tech argument. One side sees fairness. The other sees football losing its soul.
Semi-automated offside football and VAR technology adds to the tension. Twelve cameras capture 50 stills per second from each player. When the system detects an attacker beyond the second-last defender, it alerts the assistant referee through the earpiece. Clear offsides move faster, while narrow margins leave space for human judgment.
Goal-line technology decides if the ball crosses the line. RefCam shows the official point of view. Lenovo’s FIFA AI Pro gives teams analytics. Players monitor track performance and injury risk. Fans in some sections can watch interactive VAR replays.
The referee still matters because no sensor can calm angry players or understand the emotional temperature of a match, leading to arguments against VAR in football. FIFA football VAR creates accuracy that can protect football from clear mistakes, but if every celebration waits for data approval, the World Cup risks trading legacy for precision.
The legacy space of the traditional FIFA World Cup is shrinking, and arguments against VAR in football are spreading, with some believing it’s stripping the very human soul from the game.
HCI technology is giving football sharper eyes, but the sport must decide how much of its human heart it is willing to hand to the machine.
Technology Takes the Whistle
The 2026 World Cup hosted in Canada, Mexico, and the US has become the most technology-drenched tournament in football history, with HCI technology taking center stage. Referees, players, fans, cameras, sensors, and AI systems interact in real time to set the ground rules on how the match is judged.
The HCI technologies mentioned include Video Assistant Referee (VAR), semi-automated offside technology (SAOT), AI-made 3D player avatars, connected ball technology, goal-line technology, referee-mounted cameras, player chest monitors, AI analytics tools, tracking cameras, interactive fan replays, facial recognition, anti-drone surveillance, AI-stabilized broadcast footage, and data-supported cooling gear.
Football and VAR remain the loudest part of this shift, but its implantation is not exclusive to this year’s tournament, as the first use of VAR in football was at the 2018 FIFA World Cup. Football before VAR implementation was different.
VAR lets match officials in a control room to review goals, penalties, offside calls, mistaken identity, and now some corner-kick decisions and second yellow cards. The final decision is still deferred to the on-field referee, but the referee is no longer alone.
Recent matches showed this again and again this summer, and the 2026 FIFA football VAR integration brought accuracy with a cost.
Advantages of VAT football technology allow the referee to become both the judge and operator, managing players while waiting for data. By doing so, fans get more information, but also more delays, doubts, and time to ask whether football is being corrected or controlled.
AI avatars are meant to close that trust gap. At this World Cup, 3D player avatars help explain tight offside calls. In one Colombia-Portugal case, an avatar of Davinson Sánchez was shown beside a neon green offside line cutting across his right toe. It explained the call but became a meme because the margin was so small.
Inside Telecom provides you with an extensive list of content covering all aspects of the tech industry. Keep an eye on our Intelligent Tech sections to stay informed and up-to-date with our daily articles.
