Ernesto Frits Hoost is a Dutch retired professional kickboxer. A four-time K-1 World Champion, Hoost is considered to be one of the greatest kickboxers of all time. Debuting in 1993 at the K-1 World Grand Prix 1993, where he came just one win short of the world title, Hoost announced his retirement thirteen years later on 2 December 2006 after the K-1 World GP Final tournament in Tokyo Dome, Japan. Hoost holds notable victories over Peter Aerts (4x), Branko Cikatić, Mirko Cro Cop (3x), Jérôme Le Banner (3x), Andy Hug (3x), Ray Sefo (3x), Musashi (2x), Mike Bernardo, Francisco Filho (2x), Sam Greco, Stefan Leko (3x), Mark Hunt, Cyril Abidi, and Glaube Feitosa.

Mark Hunt is a New Zealand former professional mixed martial artist and kickboxer. Hunt competed in the Ultimate Fighting Championship (UFC) until 2018 and was the winner of the 2001 K-1 World Grand Prix. He is known as "King of Walk-Offs" due to his popularization of walking away and stopping attacks before the referee officially ends the match.