Excerpt from Mohammad Ali wiki--

Ali fought Terrell in Houston on February 6, 1967. Terrell, who was unbeaten in five years and had defeated many of the boxers Ali had faced, was billed as Ali's toughest opponent since Liston; he was big, strong and had a three-inch reach advantage over Ali. During the lead up to the bout, Terrell repeatedly called Ali "Clay", much to Ali's annoyance. The two almost came to blows over the name issue in a pre-fight interview with Howard Cosell. Ali seemed intent on humiliating Terrell. "I want to torture him", he said. "A clean knockout is too good for him."[49] The fight was close until the seventh round, when Ali bloodied Terrell and almost knocked him out. In the eighth round, Ali taunted Terrell, hitting him with jabs and shouting between punches, "What's my name, Uncle Tom ... what's my name?" Ali won a unanimous 15-round decision. Terrell claimed that early in the fight Ali deliberately thumbed him in the eye, forcing him to fight half-blind, and then, in a clinch, rubbed the wounded eye against the ropes. Because of Ali's apparent intent to prolong the fight to inflict maximum punishment, critics described the bout as "one of the ugliest boxing fights". Tex Maule later wrote: "It was a wonderful demonstration of boxing skill and a barbarous display of cruelty." Ali denied the accusations of cruelty but, for Ali's critics, the fight provided more evidence of his arrogance.