Complaints are set to be filed against Conor McGregor and Khabib Nurmagomedov after the scenes in the aftermath of their UFC 229 bout on Saturday night.
It's thought both fighters could face disciplinary action from the Nevada Athletic State Commission.
It follows chaotic scenes in Las Vegas, when Khabib jumped out of the octagon to launch himself at McGregor's team-mate Dillon Danis.
Meanwhile, McGregor himself directed strikes at some of Khabib's cohort.
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As a result, Khabib has had his $2m purse withheld, but McGregor has had his released to him.
It could be late November before proceedings are completed.