Marvin Hagler vs. Sugar Ray Leonard, billed as The Super Fight, was a professional boxing match contested on April 6, 1987 for the WBC and The Ring magazine middleweight titles.

[1] Leonard won by a controversial split decision and ultimately this became Hagler's final fight in his career.

[9][10] Hagler had previously held the middleweight title belts of all three major sanctioning bodies, the WBA, WBC and IBF.

[13] Unknown to Hagler or the media at the time, in preparation for the fight Leonard had secretly engaged in four warm-up bouts in private with "top-20-type opponents, against whom he had gone 4–0 with two KOs".

[14] In what would go down to be among the most controversial fights in boxing history,[15] Leonard would ultimately earn a split decision victory.

Hagler later complained about Leonard not standing and fighting him face-to-face and stated that he didn't dominate the fight enough to take it from a defending champion; Leonard's supporters dismissed the notion that a defending champion has a lesser burden of performance, stating that the only advantage they have is that winning half of the rounds will retain their title, and Hagler failed to do that.

[18][19] In June 1988, 14 months after their fight, Hagler announced his retirement from boxing, declaring that he was "tired of waiting" for Leonard to grant him a rematch.

Just a month after Hagler's retirement, Leonard announced another boxing comeback to fight against WBC light-heavyweight champion Donny Lalonde at the 168lbs super-middleweight limit.