Striker Luis Suarez was his usual, tricky self in Uruguay's must-win clash with Italy, forcing goalkeeper Gianluigi Buffon into a fine save from this powerful shot in the second half.

But the game will be remembered for Suarez's clash with defender Giorgio Chiellini, who claimed he had been bitten by the Uruguay striker.

Suarez has previous on the biting front, having been banned for similar incidents in Holland and in England.

Players from both sides react after the incident. Chiellini later told Rai TV: "It was ridiculous not to send Suarez off. It is clear."

Chiellini attempts to show the referee the mark left by Suarez's alleged bite.

Suarez celebrates as Uruguay booked their place in the last 16 thanks to a 1-0 win, secured by Diego Godin's header.

Luis Suarez was seen to apparently bite opponent in key World Cup game
The incident occurred during Uruguay's 1-0 win over Italy
Suarez has twice been punished for biting opponents during his career
Football psychologist Dan Abrahams sympathizes with the soccer star

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(CNN) -- He's football's chief sinner, and Luis Suarez's alleged attempt to bite Giorgio Chiellini's shoulder in a key World Cup game has prompted an outpouring of indignation from the game's global congregation.

While many sought to condemn a man who is embroiled in the third biting controversy of his career, some observers felt compassion for the under-fire star.

"I actually feel sympathy for him," said Dan Abrahams, football psychology expert and author of "Soccer Brain."

"He's one of the world's best players and he obviously has a problem," he told CNN.

"That problem comes up at the wrong time, in the wrong place and he has to learn how to manage it, but that's tough to do."

Suarez has incisor history on the football pitch.

Read: Luis Suarez embroiled in fresh biting storm

Uruguay striker Luis Suarez, who plays his club football with Liverpool, has been accused of biting Italy defender Giorgio Chiellini during a World Cup match on Tuesday, June 24. Suarez has already been banned twice in his career for biting.

Television pictures showed Suarez dipping his head towards Chiellini, right, and when the Italian defender eventually got up, he pulled down his shirt and appeared to furiously indicate that he had been bitten on the shoulder.

"I just collided with his shoulder. They are just casual incidences that occur during a soccer game," Suarez told reporters.

Suarez holds his mouth as Chiellini sits in the background. Suarez will now face a nervous wait to find out if football's world governing body FIFA will take action retrospectively -- given it was missed by the match officials -- and punish him.

Chiellini shows an apparent bite mark on his shoulder. "Suarez is a sneak, and he gets away with it because FIFA want their stars to play in the World Cup," Chiellini told Sky Sports Italia.

Suarez, left, celebrates the 1-0 win against Italy with his teammate Walter Gargano in the tunnel after the controversial match at Estadio das Dunas.

Suarez, fourth from left, heads the ball for teammate Daniel Sturridge to score his team's second goal during the English Premier League football match between Liverpool and Newcastle United on May 11.

Suarez, left, was banned for 10 games in April 2013 after being found guilty of biting Chelsea defender Branislav Ivanovic during a English Premier League soccer match.

Ivanovic demonstrates the bite he received from Suarez to a referee.

After his move to Liverpool in 2011, Suarez, left, was found guilty of racially abusing Manchester United's Patrice Evra and was fined $63,000 and banned for eight matches.

During his time in the Netherlands with Ajax in 2011, Suarez was banned for seven games after leaving a scar on the collarbone of Amsterdam player Otman Bakkal.

Suarez celebrates a goal during a match between Utrecht and Groningen at Utrecht, Netherlands, in 2007.

Controversial striker Luis Suarez

Luis Suarez received a ten-match ban for biting Chelsea's Branislav Ivanovic in 2013.

Manchester United captain and beserker Roy Keane broke Alf-Inge Haaland's leg in a gruesome tackle in 'retaliation' for a perceived slight.

Spain's Andoni Goikoetxea once broke Diego Maradona's ankle, and reportedly kept the boot that did it in a display case at home.

Wimbledon's hard man Vinnie Jones terrorized opposition teams during his reign as leader of the "Crazy Gang."

In one of the World Cup's most enduring images, Zizou resigns himself to an early bath after headbutting Marco Materazzi in the 2006 final.

Eric Cantona accepted a ban in 1995 after kung-fu kicking a Crystal Palace fan who was verbally abusing him.

Six of the worst: Football's dirty players

Six of the worst: Players who caused a stir

When playing with Dutch club Ajax in 2007 he was suspended for seven games for biting an opponent, while he was hit with a 10-match sanction for an identical offense while playing for Liverpool in April 2013.

His short fuse, according to Abrahams, is part of a negative response to frustration which he has likely been dealing with for most of his life.

This is a player who at the age of 16 was given a red card for headbutting a referee.

"It's an instinctive response to frustration," explained Abrahams.

"Rationally, it's something that you would think that he could manage and deal with, but that's not how we work as human beings. It's something that he has to deal with and manage for the rest of his playing days."

Will this picture end Luis Suarez's World Cup? #CNNWorldCup http://t.co/iGK1lnmFI3 pic.twitter.com/7M19dr4g6v
â€" CNN Football Club (@CNNFC) June 24, 2014

One criticism of Suarez is that his past indiscretions suggest he might be irredeemably unreformable.

His misdemeanor in Natal the latest in a long line of unsavory incidents which includes serving an eight-match ban for racially abusing Manchester United's Patrice Evra in 2011.

But Abrahams insists it's too simplistic to say Suarez is a millionaire sports star who should know better.

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