Lennox Lewis vs. Željko Mavrović, billed as "Battle of the Giants", was a professional boxing match contested on September 26, 1998 for the WBC and Lineal Heavyweight Championships.

Željko Mavrović is a Croatian former professional boxer who competed from 1993 to 1998. In 1998, as an undefeated challenger, he faced Lennox Lewis for the WBC heavyweight title, but lost in what would be his final fight. After retiring from boxing, Mavrović became an entrepreneur. Željko Mavrović was the first vegetarian in the history of world boxing who fought for the title of world champion.