Mayweather-Pacquiao, Lewis-Tyson and other fights that happened too late
Spoiler alert - Floyd Mayweather vs Logan Paul isn't one of them...
There was a time when this was the biggest fight to make in British boxing. Seven years on, with world title defeats on their record, KOs to middleweight greats and their careers coming to a close, we will finally get to see them collide on Sky Sports pay-per-view.
Floyd Mayweather vs Manny Pacquiao
Billed as the 'Fight of the Century', this long-awaited and much-anticipated contest which earned both pugilists upwards of nine figures underlined Floyd Mayweather's status as the finest boxer of his generation.
Manny Pacquiao was inhibited by a shoulder injury and claimed he won afterwards but scorecards of 118-110, 116-112 and 116-112 reflected his rival's dominance, with Mayweather controlling proceedings with a ramrod jab and straight right.
Lennox Lewis vs Mike Tyson
Lennox Lewis beat Mike Tyson with an eighth-round knockout in 2002. Victory at the Pyramid Stadium in Memphis saw Lewis retain his status as the undisputed WBC, IBF, IBO heavyweight champion.
The bout was the highest-grossing event in pay-per-view history at the time, bringing in $106.9million. Though Lewis retained his titles, within a month he would lose his IBF crown after declining to face mandatory challenger Chris Byrd.
Joe Calzaghe vs Roy Jones Jr
The career of perhaps Britain's finest fighter came to a fitting conclusion at the Garden when Joe Calzaghe retired undefeated after a convincing victory over the once-great Roy Jones Jr, giving him a record of 46-0.
Recovering from a first-round knockdown, Calzaghe controlled each of the following 11. He then made the sadly all-too-rare decision to retire while near the peak of his powers, something many regret Jones Jr did not also choose to do.
James DeGale vs Chris Eubank Jr
Chris Eubank Jr revived his career with a victory that saw James DeGale announce his retirement in the aftermath of the 2017 fight.
Muhammad Ali vs Larry Holmes
One of the worst spectacles ever witnessed inside the squared circle, even Larry Holmes looked uncomfortable in there with an old and slow Muhammad Ali.