UFC 189: Mendes vs. McGregor (formerly UFC 189: Aldo vs. McGregor) took place on July 11, 2015 at MGM Grand Garden Arena in Las Vegas, Nevada.
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According to Nielsen and TheMMAReport.com, the UFC 189 preliminary card on Fox Sports 1 averaged 847,000 viewers, up 17% from the 727,000 viewers for the UFC 188 preliminary card which aired on FX, and up 9% from the 780,000 viewers for the last preliminary card to air on Fox Sports 1, UFC 187. Viewership peaked during the 9:15-9:30 segment, at 989,000 viewers.
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