A World Cup qualifying match between the United States and Australia was briefly disrupted when referee Felix Zwayer suffered a severe muscle cramp and collapsed on the field in the final minutes of play. The incident occurred late in the game, causing a visible delay as medical personnel attended to the official. Zwayer reportedly experienced significant pain as a result of the cramp. Play was halted while he received treatment, though details regarding the extent of the injury were not immediately available. The match resumed after Zwayer received medical attention and was able to continue, albeit visibly affected. The incident drew attention to the physical demands placed on referees during high-level sporting events.