Deontay Wilder vs. Tyson Fury II, billed as Unfinished Business, was a heavyweight professional boxing rematch between undefeated and reigning WBC champion Deontay Wilder and undefeated former unified WBA (Super), IBF, WBO, IBO, The Ring, and lineal champion Tyson Fury, for the WBC and vacant The Ring, and lineal heavyweight titles. The first fight ended in a controversial split draw. The fight was jointly promoted by the American Al Haymon's Premier Boxing Champions, Bob Arum's Top Rank and British Frank Warren's Queensberry Promotions. The event took place on February 22, 2020, at the MGM Grand Garden Arena, Paradise, Nevada. Fury won the bout by seventh-round technical knockout (TKO)

The fight was a rematch after the controversial split decision draw between Wilder and Fury on December 1, 2018. Out of 27 prominent boxing journalists, 15 scored Fury as the winner of the first bout, 3 scored it for Wilder, and 9 scored it as a draw.

After the bout, there were calls for an immediate rematch. The WBC announced in February 2019 that there would not be an immediate rematch as Fury signed a contract with ESPN and Top Rank that meant the negotiations would be more difficult as the rematch would be a co-promotion, of which there had only been two before: Lennox Lewis vs. Mike Tyson in 2002 and Floyd Mayweather Jr. vs. Manny Pacquiao in 2015.

As the rematch was delayed, Fury and Wilder both scheduled fights for the interim. On May 18, 2019, Wilder faced Dominic Breazeale (20–1, 18 KOs) and recorded a first-round KO. A few weeks later on June 15, 2019, Fury took on Tom Schwarz (24–0, 16 KOs) and scored a second-round TKO. Fury followed this stoppage win with a 12-round unanimous decision victory over Otto Wallin (20–0, 13 KOs) on September 14, 2019. Wilder then had a rematch with Luis Ortiz (31–1, 26 KOs) on November 23, 2019, and won by seventh-round KO.

Both Fury and Wilder called each other out after their fights, and the rematch was officially announced on December 27, 2019 for February 22, 2020 at the MGM Grand Garden Arena in Las Vegas.