At the time, Ali and Marciano were the only undefeated heavyweight champions in history and fans often debated who would win had they met in their primes.

Ali and Marciano were filmed sparring for 75 one-minute rounds producing several possible scenarios for a genuine fight, with the result claimed to have been determined using probability formulas entered into a computer.

Hank Meyer, president and salesman with one other partner in SPS, was instrumental in setting this competition up and contended at the time that it was his idea.

Woroner picked the first round of fantasy matches to be: Punch-by-punch details of the boxer's records during their prime were entered into an NCR 315 computer.

Hank Meyer, President and salesman with one other partner in SPS, was instrumental in setting this competition up and contended at the time that it was his idea.

The two fighters sparred for between 70 and 75 rounds, exchanging mainly body blows with some head shots in-between, which were later edited together according to the findings of the computer.

The outcome would not be revealed until the release of the film on January 20, 1970, shown in 1,500 theaters by video link in the United States, Canada, and throughout Europe.

He also claimed American audiences were left angered by Marciano being depicted as the winner and disputed whether the NCR 315 computer was used at all during or after filming.

[2] Ali later dropped the lawsuit upon discovering his depicted win in European theatres, while also having been made aware of the filmmaker's plans to destroy remaining prints of the film to prevent potential legal action.

The DVD includes a documentary about the film, audio of the original radio fantasy fights, archival interviews with the fighters that were chosen, and other features.