Italy's Georgio Chiellini showed off his shoulder to the referee following an incident with Uruguay's Luis Suarez.
The Italian defender claimed he had been bitten during his team's 1-0 defeat in Natal.
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.