The Uruguayan forward is accused of sinking his jaws into the shoulder of Italian defender Giorgio Chiellini in Brazil, just 14 months after he had to apologise for doing the same thing in Britain.
Fifa’s disciplinary committee said this morning that it had opened proceedings against Liverpool player Suárez, and has asked his team to present evidence by 5pm local time (9pm BST) today.
‘Any type of proof may be produced,’ Fifa noted in a statement, including ‘reports from referees, declarations from the parties and witnesses, material evidence, audio or video recordings’.
A decision on whether he is guilty of "assaulting an opponent" must be published before Saturday, when Uruguay play Colombia in a Round of 16 match.
Fifa"s rules state that any ban could apply to all football matches - both international and domestic.
The clash last night in the sweltering Arena das Dunas in Natal, Brazil, came in the final 15 minutes of a tense decisive match between Italy and Uruguay.
Both teams were fighting for qualification for the next round and the score still stood at 0-0 in the final minutes.
Then, 27-year-old Suárez clashed with Italy"s Chiellini, 29, with live footage showing him lean his head towards his opponent"s shoulder.
Both players fell to the ground with Suárez clutching his infamous teeth while Chiellini gesticulated furiously and pulled down his shirt to show the point of impact.
Close-up images appeared to show the imprints of at least five teeth on Chiellini"s naked shoulder.
But Liverpool FC star Suárez was not handed a yellow or red card - and minutes after the confrontation Uruguay went 1-0 up, winning the match and qualifying for the knockout stages.
Chiellini, who plays for Italian team Juventus, reacted furiously after the final whistle and insisted he had been bitten.
He told Rai TV: "It was ridiculous not to send Suárez off... It is clear, clear-cut and then there was the obvious dive afterwards because he knew very well that he did something that he shouldn’t have done."
"These are things that happen on the pitch, we were both in the area, he thrust his shoulder into me"
Jaws: Hungry Uruguay player Luis Suárez faces 2 year ban after biting Italian player at WorldCupJaws: Hungry Uruguay player Luis Suárez faces 2 year ban after biting Italian player at WorldCup