Ikuhisa Minowa
Thompson entered the Inoki Genome Federation (IGF) World Grand Prix for the vacant IGF Championship and fought in the Quarterfinal against Japanese legend Ikuhisa Minowa whom he defeated by Unanimous Decision at Inoki Genome Fight 3. Thompson next fought Chris Barnett in the Grand Prix semifinal at Inoki Genome Fight 4 to advance to the Championship match. Oli Thompson defeated Fernando Rodrigues, Jr by TKO in the first round to capture the 2015 IGF World GP and the IGF Championship.