[8] Checkhonin fought in the -80 kilogram event of the 2017 Tatneft Cup as well, but lost the semifinal bout against Sher Mamazulunov by an extra round decision, after he himself won an extra round decision against Dimitris Chiotis in the tournament quarterfinals.

[13] Checkhonin faced Sergey Veselkin at WLF: Russia vs. China on September 20, 2019.

[14] Chechhonin faced the WAKO-Pro Low-Kick Rules Light Cruiserweight (-85.1 kg) World champion Abderrahim Chafay at Senshi 5 on February 22, 2020.

[17][18] Chechhonin faced Mădălin Mogoș for the KWU Middleweight Championship at Senshi 6 on August 21, 2020.

[19] Checkhonin then had his ten-fight winning streak snapped by Ali Aliyev at Battle of Champions 12 on November 13, 2020, who beat him by decision.