It’s that time again. Every summer, the combat sports world turns its attention to the sweltering Nevada desert for International Fight Week. And this year, the action inside the cage is likely to rival the July heat. Unfortunately, UFC 189 is longer at a steady boil after featherweight kingpin Jose Aldo was forced out the main event due to a broken rib. However, the promotion salvaged the card by inserting two-time title challenger Chad Mendes against rising star Conor McGregor. The pair will clash for an interim belt in the headlining affair. The co-main event also features UFC gold on the line as welterweight champion Robbie Lawler rematches Canadian Rory MacDonald. Lawler captured the belt last fall with a decision win over Johny Hendricks, while MacDonald has won three straight since falling to Lawler in late 2013.