On January 2nd 1957 Gene Fullmer captured the middleweight title, the rematch was scheduled for the 5th of May.

Fullmer a stalkly built Mormon from West Jordan, Uath, had a boxing style of a barroom brawler, a granite like chin, and had bulled his way to a fifteen round decision in his first match against Sugar Ray.

For the rematch, Sugar Ray studied the fight films of their last encounter to discover a flaw in Fullmer's style. After a long search it become apparent that when Fullmer throw a right to the body, he left himself wide open to a left hook to the jaw. So the trick was to get him to throw that big right to the body.

For the first three rounds of the rematch, Fullmer resumed exactly where he left of from their previous encounter by trying to bully his way to yet another victory. In the fourth round however, Sugar Ray made a bit of a come back, but was still waiting patiently for an opportunity to exploit Fullmer's weakness. Midway through the fifth round, Sugar Ray was being back up into the neutral corner where he faked a left hook leaving his body exposed to the inevitable body shoot. Fullmer took the bait which in turn left his jaw exposed. Striking with lighting like speed Sugar Ray put all of his 159 and half pound weight behind his left hook, which landed square on the exposed jaw of Fullmer. Fullmer went down as if he'd been hit by a ton of brick. In that fraction of a second Sugar Ray Robinson, had become the middleweight champion for the fourth time. The punch that settled the fight would go on to be known as a perfect punch in boxing folk law.