As an amateur boxer, Plechko was awarded the Saint-Petersburg heavyweight title. He made his professional boxing debut on February 27, 2016, after defeating Sedrak Agagulyan in the first round. Plechko went on to win nine additional fights (and all of which were
knockouts within the first round), including victories against Evgeny Orlov and Bernard Adie. On June 10, 2017, Rostislav became the Russian heavyweight champion by stopping Vladimir Goncharov in the first round. After defeating Goncharov, Plechko went on to win the
WBA Asia heavyweight title from Ibrahim Labaran on September 7, 2017. In his most recent fight, Plechko stopped Brazilian heavyweight Irineu Beato Costa Junior in the first round. Plechko's professional record currently stands at 13 wins, 0 losses, 0 draws and 13 wins by knockout (all of which were stoppages in the first round). He also had a two out of five star rating on BoxRec but is currently unrated with his status listed as inactive, due to not having fought for over one full year. Plechko is currently coached by Alexander Zimin (Russian: Александр Зимин). == Professional boxing record ==