Luis Suarez has arrived at world sport's highest court to appeal his ban for biting an opponent at the 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 for an expected four-hour hearing Friday.
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.
"We have to have a controlled optimism because we have to respect the panel," Daniel Cravo, lawyer for the Uruguay federation, told reporters.
The court has said it expects to give a ruling next week after FIFA consented to Suarez's request for a fast-track process.
