^Primus replaced Sidney Outlaw after he was suspended for a positive drug test.
^de Souza replaced A. J. McKee after he withdrew due to medical issues. The bout took place at catchweight of 161 pounds.
^Nurmagomedov's win was later overturned to a No Contest after he tested positive for a banned substance in a prescription drug. He was not stripped of the title due to the unintentional ingestion of the substance, but did receive a suspension.
^The conclusion to the tournament was cancelled following the acquisition of Bellator MMA by Professional Fighters League in November 2023. Shabliy and Nurmagomedov did however eventually face each other the next year in a Lightweight Title bout at Bellator Champions Series 4, where Nurmagomedov won by unanimous decision.
The eight participants of the tournament were revealed on December 3, 2021. They include current champion Sergio Pettis, the former Rizin and Bellator champion Kyoji Horiguchi, another former Bellator champion in Juan Archuleta, who captured the vacant bantamweight title in 2020 against Patchy Mix, who will also be in the tournament. The final four fighters in the Grand Prix are all ranked in the top six by Bellator at 135 pounds: Magomed Magomedov, James Gallagher, Raufeon Stots and Leandro Higo.[17][18][19] Pettis and Gallagher would eventually pull out due to injuries requiring surgery.[20][21] Due to the pull outs, two wild card qualifier bouts between Josh Hill and Enrique Barzola, with the winner meeting Magomed Magomedov in the opening round, and the second qualifier between Jornel Lugo and Danny Sabatello, which will have the winner face Leandro Higo in the first round of the tournament.[22] Due to Covid, Hill had to pull out of the bout and was replaced by Nikita Mikhailov.[23][24]
^For the Bellator Lightweight World Championship. Originally a unanimous decision win for Nurmagomedov; overturned after he tested positive for a banned substance.