Luis Suarez needs treatment after a third suspension for biting in his career, according to FIFA's top World Cup official and the international players' union.

Suarez arrived home in Montevideo to a hero's welcome from Uruguay fans despite FIFA banishing him from the World Cup for biting an opponent.

Back in Rio de Janeiro on Friday, FIFA secretary general Jerome Valcke says a third incident in Suarez's career was "unacceptable."

Valcke says "I think he should find a way to stop doing it, he should go through a treatment."

The players' union FIFPro came to the same conclusion from the opposite, sympathetic approach.

FIFPro says FIFA's ban for nine Uruguay matches and four months from all football "infringes his right to work" and doesn't offer him the treatment he needs.