Nigerian boxer Efe AjagbaÂ lost his quarterfinal game toÂ Ivan Dychko.
Ajagba lost by unanimous decision of 28-29, 28-29, 28-29 to Dychko who won bronze at the London 2012 Olympics.
The Nigerian pugilist had a bright chance of progressing to the semi-finals after he out-punched his Trinidad and Tobagoâ€™s opponent Nigel Paul, through a knockout in the run-up to his quarterfinals fight.
Ajagba who is the sole boxer representing Nigeria in Rio, lost all three rounds to Dychko as he failed to throw good punches in the last two rounds.
The Nigerian boxer won gold at the 2015 All Africa Games in Congo, Brazzaville and a bronze at the 2014 Commonwealth Games in Glasgow.