Wladimir Klitschko vs. Corrie Sanders, billed as The Next Big Thing was a professional boxing match contested on 8 March 2003 for the WBO Heavyweight Championship.

[2] After failing to reach agreements with Kirk Johnson, Fres Oquendo, Lou Savarese and Danny Williams, Universum Box Promotion ultimately signed a 4-fight contract with Corrie Sanders, who was ranked No.9 contender by the WBO at the time.

In December 2003 Sanders vacated the WBO belt after refusing to fight the organization's No.1 contender Lamon Brewster.

[3] The following year he faced Klitschko's brother Vitali for the WBC championship, which was left vacant after the retirement of Lennox Lewis.

Wladimir had two more quick knockout victories before facing Lamon Brewster for the vacant WBO belt, however he was once again upset by the underdog.