Lausanne - Luis Suarez has arrived at world sport's highest court to appeal his ban for biting an opponent at the Soccer World Cup.
The Uruguay and Barcelona forward did not speak with reporters on arriving at the Court of Arbitration for Sport with his lawyers.
FIFA lawyers also declined comment heading into court.
Suarez is trying to persuade a three-member CAS panel to reduce his ban of four months from all football activity and nine Uruguay matches in official competitions.
The court has said it expects to give a ruling next week.
Barcelona begins the Spanish league season in two weeks' time.
FIFA's sanction, which runs through October 25, bars Suarez from training with Barcelona teammates.
Suarez has admitted biting Italy defender Giorgio Chiellini's shoulder during Uruguay's 1-0 win in Natal, Brazil.