Luis Suarez said he did not deliberately bite Italy's Giorgio Chiellini at the World Cup, according to the Associated Press.
In paragraph six of Fifa's ruling on the Liverpool striker, which has been seen by the news agency, Suarez wrote: "After the impact...I lost my balance, making my body unstable and falling on top of my opponent.
"At that moment I hit my face against the player leaving a small bruise on my cheek and a strong pain in my teeth."
Suarez has been banned from football for four months after Fifa ruled his bite was "deliberate, intentional and without provocation."
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.