Belov started his single-seater career in the SMP F4 Championship in 2017, taking second place in the 2018 championship with five wins, before embarking on a two-pronged attack on the 2019 Italian and German F4 championships, finishing fourth and eighth respectively. In 2020, Belov started off in the Formula Renault Eurocup before a mid-season interruption took him to six drives as a replacement driver in the FIA F3 Championship. Belov switched to FRECA midway into the 2021 season.