Complex sentence: Pettis faced Dustin Poirier on November 11,2017 at UFC Fight Night 120.Pettis tapped due to a possible broken rib in the third round.
Split into simpler sentences: Pettis faced Dustin Poirier on November 11,2017 at UFC Fight Night 120. Pettis lost the fight after tapping out due to a possible broken rib in the third round.