Team Rivas don't have a right to know anything. When they sign their fight contract they put their trust in the authorities to ensure they aren't fighting a doped up fighter.
If a fighter doesn't agree with the policies and inner workings of that authority then don't sign to fight.
That's like saying every fighter deserves the right to know whether the opponent is coming into the ring with an illness or an injury. It's confidential.
If a fighter doesn't agree with the policies and inner workings of that authority then don't sign to fight.
That's like saying every fighter deserves the right to know whether the opponent is coming into the ring with an illness or an injury. It's confidential.

Comment