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Aminu Umar (C) of Nigeria controls the ball marked by Jeremy Toljan (L) and Julian Brandt (R) of Germany during the Rio 2016 Olympic Games mens semifinal football match at the Arena Corinthians Stadium in Sao Paulo, Brazil on August 17, 2016 / AFP / NELSON ALMEIDA (Photo credit should read NELSON ALMEIDA/AFP/Getty Images)

Aminu Umar (C) of Nigeria controls the ball marked by Jeremy Toljan (L) and Julian Brandt (R) of Germany during the Rio 2016 Olympic Games mens semifinal football match at the Arena Corinthians Stadium in Sao Paulo, Brazil on August 17, 2016 / AFP / NELSON ALMEIDA        (Photo credit should read NELSON ALMEIDA/AFP/Getty Images)

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Aminu Umar (L) of Nigeria vies for the ball with Lars Bender (R) of Germany during the Rio 2016 Olympic Games mens semifinal football match Nigeria vs Germany, at the Arena Corinthians Stadium in Sao Paulo, Brazil on August 17, 2016. / AFP / NELSON ALMEIDA (Photo credit should read NELSON ALMEIDA/AFP/Getty Images)

Aminu Umar (L) of Nigeria vies for the ball with Lars Bender (R) of Germany during the Rio 2016 Olympic Games mens semifinal football match Nigeria vs Germany, at the Arena Corinthians Stadium in Sao Paulo, Brazil on August 17, 2016. / AFP / NELSON ALMEIDA        (Photo credit should read NELSON ALMEIDA/AFP/Getty Images)