German referee Felix Zwayer experienced a sudden leg cramp and apparent ankle injury while officiating a recent match. The incident occurred as Zwayer was running to issue a yellow card to an American player, Chris Richardson. He collapsed on the field and was initially unable to stand. Reports indicate Zwayer recovered enough to complete the game after receiving fluids, seemingly alleviating the cramps. The nature and severity of the ankle injury remain unclear. The incident occurred during a tense period of play with ongoing player conflicts. Zwayer was able to finish the match despite the physical distress.