On January 25, 2014, Petrosyan stopped Davide Cattaneo with a body shot in round one at "Ring Wars" in Milan. He rematched Alim Nabiev at "Legend 3: Pour Homme" in Milan on April 5, 2014, again losing UD. Petrosyan defeated Mohamed Houmer by knock out in round two at "Gorizia Fight Night 2" in Gorizia, Italy on May 25, 2014 to win the vacant ISKA Super Welterweight (-70 kg/154 lb) Oriental Rules World Championship. He defended the title against Yasuhiro Kido at "Oktagon 2015: 20 Years Edition" in Milan, Italy on April 11, 2015, Charles François at "VVWS - Venum Victory World Series" in Florence, Italy on December 10, 2016, and Amancio Paraschiv at "Bellator Kickboxing 8" in Florence, Italy on December 9, 2017.