avoid further punishment. After admonishing Ferguson several times to obey his commands to box, the referee finally stopped the fight near the middle of the sixth round. The fight was initially ruled a win for Tyson by disqualification (DQ) of his opponent. The ruling was "adjusted" to a win by technical knockout (TKO) after Tyson's corner protested that a DQ win would end Tyson's string of knockout victories, and that a knockout would have been the inevitable result. In July, after recording six more knockout victories, Tyson fought former world title challenger Marvis Frazier in Glens Falls, New York, on another ABC Sports broadcast. Tyson won easily, charging at Frazier at the opening bell and hitting him with an uppercut that knocked Frazier unconscious thirty seconds into the fight. On November 22, 1986, Tyson was given his first title fight against Trevor Berbick for the World Boxing Council (WBC) heavyweight championship. Tyson won the title by TKO in the second round, and at the age of 20 years and 4 months became the youngest heavyweight champion in history. He added the WBA and IBF titles after defeating James Smith and Tony Tucker in 1987. Tyson's dominant performance brought many accolades. Donald Saunders wrote: "The noble and manly art of boxing can at least cease worrying about its immediate future, now [that] it has discovered a heavyweight champion fit to stand alongside Dempsey, Tunney, Louis, Marciano, and Ali." Tyson intimidated fighters with his strength, combined with outstanding hand speed, accuracy, coordination and timing. Tyson also possessed notable defensive abilities, holding his hands high in the peek-a-boo style taught by his mentor Cus D'Amato to slip under and weave around his opponent's punches while timing his own. Tyson's explosive punching technique was due in large part to crouching immediately prior to throwing a hook or an uppercut: this allowed the 'spring' of his legs to add power to the punch. Among his signature moves was a right hook to his opponent's body followed by a right uppercut to his opponent's chin. Lorenzo Boyd, Jesse Ferguson and José Ribalta were each knocked down by this combination. Undisputed champion Expectations for Tyson were extremely high, and he was the favorite to win the heavyweight unification series, a tournament designed to establish an undisputed heavyweight champion. Tyson defended his title against James Smith on March 7, 1987, in Las Vegas, Nevada. He won by unanimous