During the intense match, he suddenly crumpled to the ground from exhaustion.

crumpled 是动词 crumple 的过去式，crumple 本意是"压皱、弄皱"，引申为"（因无力支撑而）瘫倒、倒下"，形容人因极度疲劳或受伤而突然失去支撑力倒下。