Tyson was uncertain if he’d beat the Klitschko's -and reverse of what you asked… Ali called Louis the actual greatest but also that he wasn’t sure if he’d beat Tyson… when Holmes said “Everybody in this room would whoop Tyson” he said “speak for yourself”… these are just a few off the top of my head.
He didnt have a race based fear; Doc Kearns just didnt think fighting a black fighter was profitable.