A teenager who was allegedly racially taunted in a private school football match, before being struck behind play and having five teeth knocked out, has spoken of the traumatic incident.

Ngor Aker, 17, whose family fled South Sudan many years ago, was rushed to hospital following the alleged incident on Saturday. He was part of a team from Geelong College taking on Haileybury College in an Associated Public Schools match. The match is now being investigated by both schools.

Ngor Aker following the football game. Credit:Courtesy: Nine News.

Ngor said the incident began when racist remarks were directed at him by an opposition player.

"A bloke turned around and said, 'watch out you've got a shadow following you', and I walked up to him and said, 'oi, trying to be racist?'" Ngor told Nine News. "And he's like 'yeah I am, what are you going to do?'"