Bellator Season 8 Lightweight tournament. He faced Brazilian Kickboxer Thiago Michel in the quarter finals on January 31, 2013, at Bellator 87 and won via submission in the second round. Sarnavskiy was originally scheduled to face David Rickels in the semifinals. However, Sarnavskiy fractured his hand during his first fight and had to withdraw from the tournament. In the fall of 2013, Sarnavskiy entered the next Lightweight tournament. He faced Marcus Davis on September 27, 2013, at Bellator 101 in the Quarterfinals of Bellator's Season Nine Lightweight Tournament. After knocking Davis down with a punch, he took his back and eventually won via a rear naked choke submission. Sarnavskiy faced Ricardo Tirloni in the semifinals and won via triangle choke in the first round. Sarnavskiy faced Will Brooks in the finals and lost via unanimous decision. After nearly a year away from the Bellator cage, Sarnavskiy was expected to face John Gunderson on October 10, 2014, at Bellator 128. However, Gunderson withdrew from the bout and retired from MMA fighting. Derek Campos stepped in as a replacement. An injury forced Campos out of the fight, Sarnavskiy eventually faced promotional newcomer Dakota Cochrane. He won the fight by submission in the first round. Sarnavskiy faced Marcin Held on April 10, 2015, at Bellator 136. He lost the fight via verbal submission in the third round and was subsequently released from the promotion. Post-Bellator MMA Sarnavskiy faced Jesse Ronson on October 3, 2015, at Abu Dhabi Warriors 3. He won via unanimous decision. Eurasia Fight Nights Global (EFN) Sarnavskiy faced Murad Machaev on February 26, 2016, at Fight Nights: Battle of Moscow 21. He lost the fight via unanimous decision. Sarnavskiy faced Dmitry Bikrev on April 29, 2016, at Fight Nights Global 46. He won the fight via submission in the second round. Absolute Championship Berkut Sarnavskiy faced Ustarmagomed Gadzhidaudov on September 17, 2016, at ACB 45: Silva vs. Magomedsharipov. He lost the fight by knockout in the second round. Sarnavskiy faced Ramazan Esenbaev on December 18, 2016, at ACB 50: Rasulov vs. Goltsov. He won thefight via TKO in the third round. Sarnavskiy faced Eduard Vartanyan on April 15, 2017, at ACB 57: Payback. He lost the fight via submission in the second round. Sarnavskiy faced Shamil Nikaev at ACB 80 on February 16, 2018. He lost the bout via split decision. Bouncing back from the loss, Sarnavskiy knocked out Herdeson