During an amateur career in which he compiled a record of 305–16, Agrba was a two-time runner up at the Russian National Championships; won gold medals at the 2016 World University Championships and 2018 Strandzha Cup; and silver medals at the 2019 European Games[2] and 2019 Boxing World Cup.

[3] Agrba made his professional debut on 13 December 2019, scoring a six-round unanimous decision (UD) victory over Shokhrukh Abdiev at Manezh in Vladikavkaz, Russia.

[4] He won his first professional title in his next fight, the WBA Fedecaribe welterweight title, after defeating Flavio Cesar Ramos via third-round stoppage by corner retirement (RTD) on 7 February 2020 at the Roberto Durán Arena in Panama City.

[5] He moved down in weight for his next fight, facing Manuk Dilanyan for the vacant WBA Continental super-lightweight title on 15 June 2020 at the Soviet Wings Sport Palace in Moscow.

Agrba captured his second WBA regional title in a shutout UD victory, with all three judges scoring the bout 100–90.