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RIO DE JANEIRO, BRAZIL- AUGUST 17: Andre De Grasse of Canada challenged Usain Bolt of Jamaica in the 200m semifinal 2016 Rio summer Olympic Games. Bolt was amused by the young Canadian's push. Lucas Oleniuk-Toronto Star (Lucas Oleniuk/Toronto Star via Getty Images)

RIO DE JANEIRO, BRAZIL- AUGUST 17:
Andre De Grasse of Canada challenged Usain Bolt of Jamaica in the 200m semifinal 2016 Rio summer Olympic Games. Bolt was amused by the young Canadian's push.
Lucas Oleniuk-Toronto Star        (Lucas Oleniuk/Toronto Star via Getty Images)