Barcelona’s Uruguyan striker, in a blue checked shirt and jeans, was tight-lipped as he ran the gauntlet of press photographers on his way into the hearing shortly before 10 am local time (0800 GMT).
Suarez was banned from all football-related activity for four months after biting Italy defender Giorgio Chiellini on the shoulder during a World Cup group game in the Brazilian city of Natal.
He subsequently left Liverpool for Barcelona in a 95 million-euro ($127 million) deal but will have to wait until late October before he can play for his new club.
His legal team said on Thursday they were confident of obtaining a reduction of the ban to two months, meaning the former Liverpool striker would be available to play from 25 August, and for him to be allowed to train with Barcelona for the duration of his suspension.
The verdict was not expected for several days.