Italy's Giorgio Chiellini has claimed he was bitten by Uruguay's Luis Suarez during their 2014 World Cup Group D final match in Natal.
Chiellini held onto his arm after the incident, while Suarez held onto his own teeth.
Chiellini was also seen pulling down his shirt to expose his shoulder, claiming to show an apparent injury.
If upheld, the four-month Luis Suarez ban from football would see him miss 16 matches, including nine Premier League games.
Big brands are continuing to exploit Luis Suarez's latest biting incident with a series of adverts.
Suarez needs to be frustrated on the training ground so he can learn how to respond differently, a sports psychologist has told ITV News.