 Nigeria Welterweight champion Kamaru Usman , go fight Colby Covington for UFC 245 inside octagon for Las Vegas , United States on Saturday night .  B-LOC O O B-PER I-PER O O O B-PER I-PER O B-ORG O O O B-LOC I-LOC O B-LOC I-LOC O B-DATE I-DATE O 