Chile lost their Davis Cup qualifier against Belgium when Cristian Garin refused to continue playing after being knocked over by opponent Zizou Bergs.
At a changeover during their singles match in Hasselt, a celebrating and leaping Bergs struck him in the face with his right shoulder.
Bergs apologised immediately and Garin was cleared to play after receiving medical attention.
Bergs was given a code violation for unsportsmanlike conduct but Chile called for him to be disqualified.
Garin was given three successive time violations for refusing to play, resulting in a game penalty to hand Berg a 6-3 4-6 7-5 victory and ensure Chile won the tie 3-1.