[1] Shumenov developed a love for combat sports while watching Bruce Lee films and began practicing numerous martial arts disciplines as he matured.

His results were: He qualified for the Athens Games by winning the gold medal at the 2004 Asian Amateur Boxing Championships in Puerto Princesa, Philippines.

His most high-profile fight came in August 2008 when he faced former world champion Montell Griffin in Chimkent, Kazakhstan to defend his regional WBC and WBO titles.

The fight took place in Shumenov's home country of Kazakhstan and resulted in the first loss of his career when Campillo was declared the winner by majority decision (MD).

A rematch took place on 9 January 2010, with the result being reversed with Shumenov being declared the winner by what was considered an extremely controversial split decision (SD).

[4] With this victory he became the quickest man ever to win a world title in the light-heavyweight division, beating the record of fifteen fights set by Jeff Harding in 1989.

[6] In his place, former middleweight world champion William Joppy stepped in at short notice, and was knocked out by Shumenov in the sixth round.

[11] Shumenov defeated BJ Flores by a UD for WBA interim cruiserweight title at the Palms Casino Resort in Las Vegas on 25 July 2015 in a Premier Boxing Champions bout broadcast live on NBCSN.