Sweden's 5-1 Victory Over Tunisia: VAR, Microchips, and Controversy
The fourth goal looked routine on the scoreboard. On the pitch, and in the VAR booth, it was anything but.
Sweden were already cruising towards a 5-1 World Cup win over Tunisia on Sunday night when Mattias Svanberg, fresh off the bench, swept in a Yasin Ayari free-kick just 18 seconds after coming on. The flag went up. The celebrations stopped. Another seemingly straightforward set-piece goal was about to be rubbed out for offside.
Then the technology intervened.
From Offside to Onside in a Split Second
The assistant’s flag had Svanberg offside when Ayari delivered the ball. That looked that. Tunisia’s line had stepped, the Swede had gone early, and the referee initially agreed.
Sweden’s players and coaching staff didn’t. They surrounded the officials, pointing towards the middle of the box, insisting there had been a touch on the delivery. If Alexander Isak had grazed the ball on its way through, the whole picture changed. A new “phase”, a new moment, and crucially, a new offside line.
So the move went upstairs.
In the VAR room, the Video Assistant Referee team had more than slow-motion replays to work with. They had data. The Trionda match ball, created by Adidas for this World Cup, carries a microchip that detects every contact – foot, head, hand – and feeds that information instantly to the officials.
On the broadcast, viewers saw the evidence: a flat waveform line as the ball travelled, then a sudden spike the instant it passed Isak’s outstretched right boot. To the naked eye, it barely looked like a touch. On the sensor, it was clear enough.
That tiny vibration changed everything. By the time Isak brushed the ball, Svanberg had retreated into an onside position. The original offside no longer applied. The goal stood.
“It is a good finish by Svanberg, but I can understand why the Tunisian players will be disappointed because when you look at it, it didn't look like there was a touch,” former Republic of Ireland striker Clinton Morrison said on BBC Radio 5 Live. “It must have been the slightest touch off the outside of his right boot. Credit to VAR, credit to the referee. They got it spot on.”
Cricket’s ‘Snicko’ Comes to Football
For cricket fans, that graphic looked familiar. The waveform, the flat line, the sudden jump at the moment of contact – it was the language of Snickometer, or “Snicko”, imported into football.
In cricket, Snickometer has long helped umpires decide whether a batter has edged the ball. The system plays frame-by-frame footage alongside an audio waveform, showing a spike if the ball clips the bat. It was devised in the mid-1990s by English computer scientist Allan Plaskett and became a staple of televised Tests, especially in Australia and New Zealand.
Its role has started to shrink as newer tools arrive. Snickometer runs at 340 frames per second, now outpaced by more advanced systems such as UltraEdge, which has replaced it in Test matches in England. Even so, it remains powerful enough to shape series and stir arguments. During the 2025-26 Ashes, Australian batter Alex Carey survived a tight call on 72 after what officials later described as “human error” with Snicko’s operation. He went on to make 106 in Adelaide, and the debate rumbled on.
Football has watched all of this and borrowed the concept, then pushed it further.
Inside Adidas’ Connected Ball
At this World Cup, the Trionda ball is more than a piece of equipment; it is a live data source. Adidas’ Connected Ball Technology allows every touch to be tracked and sent to VAR in real time. The chip inside the ball records precise contact points and timings, giving officials another layer of information to combine with the offside lines and camera feeds.
Adidas say the system “enables faster in-game officiating decisions and more insight into gameplay than ever before.” In practice, it gives referees a digital confirmation of what the eye might miss – the slightest flick, the faintest deflection, the marginal handball.
In the Sweden–Tunisia match, that meant the sensor spike as the ball skimmed Isak’s boot. The replay of the waveform left little room for doubt, even if the Tunisian defenders felt they had executed their trap perfectly.
This is not a one-off experiment. The same technology has already left fingerprints on major tournaments.
At the 2022 World Cup in Qatar, the connected ball helped settle a debate at the heart of Portugal’s 2-0 win over Uruguay. Bruno Fernandes swung in a cross towards Cristiano Ronaldo, who wheeled away claiming the goal after the ball nestled in the net. The data told a different story. No contact from Ronaldo, no change in the ball’s vibration pattern as it passed his head. The goal stayed with Fernandes.
At Euro 2024, Belgium found themselves on the wrong side of a similar intervention. Romelu Lukaku thought he had pulled his side level against Slovakia, only for a review to show teammate Lois Openda had handled the ball in the build-up. Again, the technology traced a touch that replays struggled to show clearly at full speed. The goal was wiped out.
The New Frontier of Marginal Calls
Football has always wrestled with its tightest decisions: was there a touch, was there a handball, did the striker get the final glance? For decades, those arguments lived in the grey area between television angles and human perception.
Now, that grey area is shrinking.
The Sweden–Tunisia incident laid out the new reality. One goal, shaped not just by a linesman’s flag or a referee’s instinct, but by a microchip buried inside the match ball and a waveform on a screen.
The question is no longer whether the technology works. It clearly does. The question is how far the sport is willing to let those invisible touches and digital spikes define its biggest moments.
