"Frazier and Muhammad Ali were quintessential the apex of pedigree fighting in which each man would not give an inch until they were dead. Their era was competitive fighting at the highest level. As a young fighter it has always been an honor to be compared to Frazier."

Tyson, who uploaded a pic of Ali and Frazier as his Twitter background, wrote, "My family and I are sending our sincerest condolences to the Joe Frazier family."