How can he prove that Cesar said something racist to him?
It was obvious why Eto'o did it. Less than a minute before the headbutt, Eto'o and Cesar were in a duel where Eto'o was using his elbow and Cesar was using his fist. Both got kicks but Eto'o thought that he should continue the fight the next moment he came close to Cesar.
There is no way, even in this joke of a federation, Eto'o not to get a minimum 2 matches ban (which will still be a huge gift to Inter).
I am sure that Berlu's media will do its job.