Former UFC welterweight champion Kamaru Usman got the call nine days before UFC 294 to take on unbeaten Khamzat Chimaev . With mixed emotions ‘The Nigerian Nightmare’ accepted the fight. Chimaev was originally slated to face Paulo Costa in the UFC 294 co-main event, but Costa was removed from the bout after it was reveal that he had surgery weeks before the event
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Kamaru Usman explains decision to face Khamzat Chimaev – MMA Weekly