While Hawk-Eye is a highly accurate goal-line technology system, it is not infallible and there have been instances where it did not correctly determine whether the ball crossed the goal line or not. For example, in the 2013 UEFA Champions League match between Bayer Leverkusen and Paris Saint-Germain, the assistant referee initially ruled that a Javier Hernández goal did not cross the line, as Hawk-Eye did not provide a sufficient resolution to determine conclusively. However, further analysis showed that the assistant referee was incorrect, and the goal was ultimately awarded. While such situations are exceptional, they still raise concerns about the reliability of Hawk-Eye as a definitive tool in football refereeing. It is crucial for football technology systems to consistently deliver accurate and precise assessments during matches to avoid controversial moments and ensure fair outcomes.