Arne Espeel, a goalkeeper for Winkel Sport B in Belgium, died after collapsing on the field on Saturday, per Reuters.
The 25-year-old had made a save on a penalty but dropped to the ground afterwards. Emergency services tried to revive him with a defibrillator. He was taken to the hospital and pronounced dead a short time later.
"The ball was still in play. Our goalkeeper got up as fast as possible to receive the ball, but then he fell," assistant coach Stefaan Dewerchin said, per Samuel Meade of Mirror. "It was really terrible to watch.