Evander Holyfield vs. Lennox Lewis II, billed as Unfinished Business, was a professional boxing match contested on November 13, 1999 for the WBA, WBC, IBF, and vacant IBO undisputed heavyweight championship.

[4] The match was originally scheduled for September, but was pushed back to November 13, with Las Vegas' Thomas & Mack Center being announced as the site of the fight.

[5] The fight was to occur exactly seven years after Riddick Bowe defeated Holyfield to become the last undisputed heavyweight champion.

Ruiz's promoter Don King challenged the decision in court and a clause was found in Lewis' contract that stated the winner of the Holyfield–Lewis fight would first defend his titles against the WBA's number one contender.

Holyfield defeated Ruiz by unanimous decision to regain the title, becoming the first four-time heavyweight champion in boxing history.

This would be the last fight for the undisputed heavyweight championship until Oleksandr Usyk defeated Tyson Fury on May 18, 2024.