Sergei Kharitonov has become the latest former PRIDE star to move over to what was the competition, with his official website announcing that he has joined K-1 HERO'S. The 27-year-old Russian has signed a big contract with K-1's parent company FEG and is not only likely to fight under MMA rules, but K-1's traditional kickboxing rules. He is likely to become an important player in the company's heavyweight division.