Mahamadou Maharana Amadou T of Niger competes during the taekwondo men's 55kg semifinal against Georgii Popov of Russia at the 2018 Summer Youth Olympic Games in Buenos Aires, Argentina on Oct. 8, 2018. Mahamadou Maharana Amadou T lost 13-33. (Xinhua/He Changshan)

Mahamadou Maharana Amadou T of Niger gets injured during the taekwondo men's 55kg semifinal against Georgii Popov of Russia at the 2018 Summer Youth Olympic Games in Buenos Aires, Argentina on Oct. 8, 2018. Mahamadou Maharana Amadou T lost 13-33. (Xinhua/He Changshan)