Petar Majstorovic (born 5 February 1975), is K-1 WGP Light Heavyweight Champion 2017 a Swiss-Croatian heavyweight karateka and kickboxer.
He is World Kickboxing Network (W.K.N.) former World Champion and two times K-1 preliminary tournaments champion in Croatia and Germany.
He trained with Andy Hug from 1992 to 2000.Majstorovic's karate record is at 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.