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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MAIN CARD (Pay-per-view, 10:00 PM ET)
• Conor McGregor vs. Chad Mendes (UFC Interim Featherweight Championship): Conor McGregor def. Chad Mendes via TKO (punches) at 4:57 of Round 2.
• Robbie Lawler vs. Rory MacDonald: Robbie Lawler def. Rory MacDonald via TKO (punches) at 1:00 of Round 5.
• Dennis Bermudez vs. Jeremy Stephens: Jeremy Stephens def. Dennis Bermudez via TKO (jumping knee, punches) at 0:32 of Round 3.
• Gunnar Nelson vs. Brandon Thatch: Gunnar Nelson def. Brandon Thatch via submission (rear-naked choke) at 2:54 of Round 1.
• Thomas Almeida vs. Brad Pickett Thomas Almeida def. Brad Pickett via KO (flying knee) at 0:29 of Round 2.
PRELIMINARY CARD (FOX Sports 1, 8:00 PM ET)
• Tim Means vs. Matt Brown: Matt Brown def. Tim Means via submission (guillotine) at 4:44 of Round 1.
• Mike Swick vs. Alex Garcia: Alex Garcia def. Mike Swick via unanimous decision (29-28, 30-27, 30-27).
• John Howard vs. Cathal Pendred: John Howard def. Cathal Pendred via split decision (29-28, 28-29, 29-28).
• Henry Briones vs. Cody Garbrandt: Cody Garbrandt def. Henry Briones via unanimous decision (30-27, 30-27, 30-27).
PRELIMINARY CARD (UFC Fight Pass, 7:00 PM ET)
• Neil Seery vs. Louis Smolka: Louis Smolka def. Neil Seery via unanimous decision (30-27, 30-27, 30-27).
• Yosdenis Cedeno vs. Cody Pfister: Cody Pfister def. Yosdenis Cedeno via unanimous decision (29-28, 29-28, 29-28).