During a tense match between Croatia and Portugal in Toronto, the "Trionda" ball fitted with advanced sensors played a decisive role in one of the most contentious moments in World Cup history. The technology detected a touch on Igor Mantanovic's head that went undetected by the naked eye and even video replays, leading to the disallowed late equalizer for Croatia. Despite visual inconclusivity in multiple slow-motion replays, FIFA insists the ball sensors provided an unprecedented level of data, enabling fast and accurate decisions. The small inertial measurement unit (IMU) sensor within the Adidas-manufactured ball captures data 500 times per second, tracking ball acceleration and movements in three dimensions. The technology aids in determining offsides, handballs, and penalties. The call was controversial due to its impact on the outcome of the match, leaving Croatia players and fans devastated. FIFA utilized this technology at previous tournaments, including the 2022 World Cup and the most recent men's European Championship in 2024. Controversies surrounding the use of connected ball technology have sparked debates among coaches and sports enthusiasts about the role technology should play in determining outcomes in football. AP sports writer Maura Carey contributed to this report, with James Robson providing additional insights. For more coverage on the World Cup, visit our dedicated section at x.com/jamesalanrobson.