Semmy Schilt (Dutch pronunciation: [ˈsɛmi ˈsxɪlt]; born October 27, 1973), also known as Sem Schilt, is a Dutch Ashihara karateka, kickboxer, mixed martial artist and four time (three times consecutive) K-1 World GP champion. He is the first and only fighter in K-1 history to win the championship three times in a row, and also shares the record with Ernesto Hoost for most GPs won, with four. He has also competed in mixed-martial arts fights for the Pride Fighting Championship, UFC and Pancrase organizations. He holds notable MMA wins over Guy Mezger, Bob Schrijber, Ikuhisa Minowa and Gan McGee.

On November 19, 2005 Schilt made his first appearance at the K-1 finals. As an Ashihara Karate fighter, Schilt beat Ray Sefo in the quarter finals and the defending champion Remy Bonjasky by knockout in the semifinals. Schilt then met Glaube Feitosa in the tournament finals and won by knockout due to knee strike to win his first K-1 World Grand Prix title.

On December 31, 2005 at the K-1 PREMIUM 2005 Dynamite!! event, he defeated former four time K-1 World Grand Prix champion Ernesto Hoost.

Badr Hari born December 8, 1984 in Amsterdam, Netherlands is a Moroccan-Dutch super heavyweight kickboxer from the Netherlands, fighting out of Mike's Gym in Amsterdam. He is a former K-1 Heavyweight champion (2007—2008) and K-1 World Grand Prix 2009 finalist. As of May 2011, Hari is ranked the #2 heavyweight in the world by LiverKick.com. Hari has been a prominent figure in the world of kickboxing and considered one of the best kickboxers in the world, however he has been involved in a number of controversies relating to his "unsportsmanlike conducts" in the sport and alleged crimes of violence outside of the ring.

He was disqualified in the final match of the K-1 World GP 2008 Finals due to "unsportsmanlike conduct" against Remy Bonjasky. In May 2009 he knocked out Semmy Schilt in the first round and became the first ever It's Showtime World Heavyweight champion. However he lost this title when he was again disqualified after another unsportsmanlike conduct against Hesdy Gerges at the It's Showtime 2010 Amsterdam. Aside from the sport, he has been arrested multiple times since 2006 on various assault charges against others.

Peter Aerts (born October 25, 1970) is a Dutch super heavyweight kickboxer. Known for his devastating high kicks, which earned him the nickname "The Dutch Lumberjack", he is widely considered to be one of the greatest heavyweight kickboxers ever, along with Remy Bonjasky, Andy Hug, Ernesto Hoost and Semmy Schilt.

Born in Eindhoven, Netherlands, Aerts began training in Muay Thai and kickboxing at the age of fourteen. He won his first world title when he was nineteen years old in 1990, taking the International Kick Boxing Federation's Heavyweight Championship. He would also add the Dutch heavyweight title the World Muay Thai Association's heavyweight title to his mantlepiece before going on to compete in the K-1 organization in Japan. He has competed in every K-1 World Grand Prix except one (2009), which has led to him being referred to as "Mr. K-1".^{[not in citation given]}

A three-time K-1 World Grand Prix Champion, he debuted at the inaugural K-1 World GP in 1993 where he was eliminated by fellow K-1 legend Ernesto Hoost. He won his first Grand Prix in 1994 by knocking out Rob van Esdonk and Patrick Smith in the quarter-finals and semi-finals, respectively, before taking a unanimous decision over Masaaki Satake in the final.

Remy "The Flying Gentleman" Bonjasky (born January 10, 1976) is a Dutch super heavyweight kickboxer of Surinamese descent. He is a three-time K-1 World Grand Prix champion, who has won the title in 2003, 2004, and 2008. He has been known for his flying kicks and knee attacks, hence the nickname of "The Flying Gentleman".

Bonjasky was born in Paramaribo, Suriname and moved to Tilburg, the Netherlands when he was 5 years old.

He was involved in football (soccer) during his teens, but when he broke his leg he chose to stop playing. At the age of 18, when a friend brought him to the Mejiro kickboxing gym to "see who is the best", Bonjasky decided to stay and train and eventually fell in love with kickboxing, although he declared Muay Thai to be his style.

Bonjasky had his first fight at the age of 19 against an established Dutch mixed martial arts (MMA) fighter named Valentijn Overeem. Bonjasky won by TKO. From this moment on he quit his job as a network operator and focused on training full time. Despite losing his first K-1 fight by split decision he made his second fight against an established K-1 fighter, Ray Sefo. Despite the odds he won the fight by TKO.

Gökhan Saki (born October 8, 1983 in Schiedam, Netherlands) is a Dutch-Turkish heavyweight kickboxer from the Netherlands, fighting out of Golden Glory Gym in Breda, Netherlands. He is two time Dutch and European Muay Thai champion, K-1 World GP 2006 in Amsterdam tournament finalist and K-1 World Grand Prix 2008 in Hawaii champion as the first ever Turkish fighter holding a K-1 tournament title.

Saki was born and raised in Schiedam, a town located in the Netherlands, to a large family. He started practicing kickboxing at the age of 11 when he also began playing football (soccer). He dropped out of school at the age of 14 for a reason related to his family, and quit playing soccer at the age of 16 because of his preference for kickboxing.

His initial trainer was Jan Pasztjerik, under whom he became Dutch, European and World Muay Thai champion within three years, before moving to the Golden Glory gym in 2003. In 2006, he returned to Pasztjerik as he embarked on a joint production with Golden Glory and Pasztjerik. Training at Golden Glory with Cor Hemmers, Saki became a well-known fighter as he took wins over André Tete, Vitali Akhramenko and Henriques Zowa, while also facing well-established fighters such as Badr Hari and Nicholas Pettas. Despite his success under Hemmers, Saki considers Pasztjerik as the main influence who helped him develop to the fighter he would become.