The fight, which took place in Yekaterinburg, lasted all 12 rounds and ended with the victory of the Russian by a decision of the judges.

For 25-year-old Kurbanov, this victory became the 22nd in his career in the absence of defeats, it will allow him to rise from fifth to second in the WBO ranking.

Smith, 32, who held the WBO championship belt from 2015 to 2016, suffered his third loss with 29 wins.

Earlier it was reported that Sergei Kovalev may hold the next fight in Russia.