Russian boxer Bahram Murtazaliev defeated Jack Kulkay from Germany in a 12-round fight in Falkensee, Germany.
The fight in the weight category up to 69.9 kg ended in a technical knockout in the 11th round.
Murtazaliev won the world champion title according to the International Boxing Federation (IBF).
The 31-year-old Murtazaliev now has 22 wins (16 by knockout) and still no defeats.
The Russian, who is developing his career in the USA, fought for the championship title for the first time.
The 38-year-old Kulkay now has 33 wins (14 by knockout) and 5 losses.