Yes Ali and Frazier generally hated each other during their professional careers. By the time both were elderly they began to get on, speaking to each other at event and communicating. I think Ali could have done a lot better in most circumstances with Frazier as he did go out of his way to annoy Frazier often. In saying that they produced some of the greatest fights. Ali’s speed was nullified by Fraziers famous left hook. They both had courage and power, speed and ring poise in an abundance. Both are living legends and their fights will be watched and remembered for centuries to come.