Vyacheslav Vasilevsky is a Russian professional mixed martial artist and sambo competitor. He has competed in professional MMA since 2008. He was the inaugural M-1 Global Light Heavyweight World Champion and also fought for Bellator MMA and Absolute Championship Akhmat. Vasilevsky is a multi-time world champion and Master of Sport in combat sambo.

M-1 Global (Mixfight-1) or MMA-1 is a mixed martial arts promotion based in St. Petersburg, Russia which organizes between 10 and 20 competitions per year.