Petar Majstorovic (born 5 February 1975), is a Swiss karateka and kickboxer. He was a two-time World Kickboxing Network (W.K.N.) World Champion and two times K-1 preliminary tournaments champion in Croatia and Germany. He trained with Andy Hug from 1992 to 2000. Majstorović's karate record is 45 wins and six losses out of 51 fights. His K-1 record is at 69 wins and 22 losses out of 90 fights. In 2009, he registered Petar Majstorovic K Gym as a private business in Bern.

Titles

Kickboxing record

!style=background:white colspan=9|Wins K-1 Light Heavyweight World Title !style=background:white colspan=9|Wins W.F.C.A. World Super Heavyweight kickboxing title !style=background:white colspan=9|Wins WPKC World Heavyweight title !style=background:white colspan=9|Fight was for K-1 Fighting Network Prague Round '07 !style=background:white colspan=9|Fight was for W.K.A. Muay Thai Super Heavyweight World title. !style=background:white colspan=9|Fight was for K-1 Spain Grand Prix 2003 in Barcelona !style=background:white colspan=9|Wins K-1 World Grand Prix 2002 Preliminary Croatia !style=background:white colspan=9|Wins K-1 World Grand Prix 2001 Preliminary Germany

Doping suspension

In 2004, Majstorović was suspended for 2 years for his refusal to submit a sample at a kickboxing event in Switzerland.