The co-main event of UFC 189: Mendes vs. McGregor is a welterweight title fight between reigning champion Robbie Lawler and challenger Rory MacDonald. It's a rematch of their November 2013 encounter at UFC 167, which ended with Lawler getting the decisive knockdown in the 3rd round en route to a split decision upset win and an eventual title shot.
For MacDonald, it was just the 2nd loss of his career and a considerable setback in his quest to become welterweight champion. Since that defeat, he's beaten Demian Maia, Tyron Woodley, and most recently Tarec Saffiedine to earn not only his title shot, but a chance to avenge his loss to Lawler.
The UFC has uploaded the full video of MacDonald's October 2014 TKO win over Saffiedine and you can watch the whole thing by pressing the play button at the top of the page. UFC 189 is exactly one week from today and Bloody Elbow will have plenty of fight week coverage of Lawler/MacDonald, Mendes/McGregor, and everything else on or relating to the card.