Ray Mercer vs. Tommy Morrison was billed as Test of Courage. It was promoted by Top Rank and was a professional boxing match contested on October 18, 1991 for the World Boxing Organization world heavyweight championship.^[10][11]

The fight was a matchup between two undefeated, up-and-coming heavyweights.

Thirty-year-old 1988 Olympic Gold Medalist Ray Mercer had won all 17 of his previous fights since turning pro in 1989 and was coming off a victory over that made him the WBO Heavyweight Champion, though the WBO title did not carry as much prestige as the WBA, WBC and IBF versions of the title. Meanwhile, 22-year-old Tommy Morrison was a perfect 28–0 with 23 victories coming by way of knockout. Morrison had four prior fights in 1991 including first round victories over former heavyweight contenders James Tillis and Pinklon Thomas. Initially, the bout was set to take place on August 9, but Morrison had to withdraw after suffering a deep cut while sparring. Mercer contimplated facing a substitute opponent, but it was announced the following week that fight would be rescheduled for October 18th.

Morrison outboxed a sluggish Mercer through the first three rounds en route to taking all three rounds on all three of the judge's scorecards.

Morrison was able to limit Mercer's offense, landed several combinations and opened up a cut on Mercer's lower lip.

However, Mercer rebounded with a strong round four, landing several hard rights to Morrison's head.

Mercer would end the fight only 28 seconds into the fifth round.

With Morrison backed up into the corner, Mercer was able to land a 15–punch combination.

Clearly hurt from the exchange, Morrison slumped against the ropes, but the referee allowed Mercer to land several more punishing blows to a now defenseless Morrison before finally ending the fight.

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Mercer's victory propelled into one of the top heavyweights in the division and he made it known in his post-match interview that he wanted a shot at Evander Holyfield's Undisputed Heavyweight title. Mercer chose to bypass a WBO title match with Michael Moorer, instead vacating the title in order to move on to a number one contenders match with Larry Holmes scheduled on February 7, 1992 with a shot at Holyfield's Undisputed title on the line. Mercer was installed as a heavy favorite over the aging Holmes, but Holmes was able to outbox and outpoint Mercer en route to a unanimous decision victory, taking Mercer's title shot against Holyfield in the process.

Morrison rebounded from the loss by winning his next eight fights before meeting George Foreman for the WBO Heavweight Championship in June 1993, which had been vacated by Moorer earlier in the year. Morrison was able to outbox Foreman and won by a lopsided unanimous decision to become the new WBO champion, as well as reestablishing him as one of the top heavyweight contenders. He then signed a deal to meet the WBC Heavyweight champion Lennox Lewis for the title, but chose to take a tuneup bout against the virtually unknown Michael Bentt before facing Lewis. The decision would prove to be unwise as Bentt brutalized Morrison during their fight, knocking him down three times in the first after which the fight was stopped and Bentt was named the winner. The loss cost Morrison his title shot against Lewis, as well as a reported $7.5 million that he was to earn in the Lewis fight.^[12]