Physicist John Eric Goff and his team at the University of Tsukuba in Japan have been studying the performance of the new World Cup ball, Trionda, used in the 2026 tournament. Their research aimed to address concerns raised by goalkeepers about the ball's flight and aerodynamics.
Goff and his team conducted lab tests, including attaching force sensors to the ball and testing it in a wind tunnel. They found that the ball's airflow change occurs at a lower speed than its predecessors, making it more stable and consistent in flight. However, they also noted that the ball's drag coefficient is slightly higher, which could affect its distance.
The team's predictions were largely borne out in real-world conditions, with some adjustments needed for high-elevation conditions. In a game played at Estadio Azteca in Mexico City, the ball's distance was affected by the lower air density, causing some players to underestimate its range.
Goff suggests that goalkeepers are prone to complaining about new balls due to a lack of familiarity with their aerodynamics. He notes that players who used the Nike Flight ball in the 2024-25 English Premier League season may already be adjusted to the Trionda's flight pattern.
The physicist's comments come as some former England goalkeeper, including Joe Hart, have raised concerns about the ball's performance. However, Goff remains skeptical about the validity of these complaints, suggesting that goalkeepers may be finding excuses for their own errors.