Colby Covington went on a fiery rant against longtime rival Khamzat Chimaev ahead of their grudge match at RAF Abu Dhabi. Khamzat Chimaev and Colby Covington have traded several barbs over the years. Chimaev notably competed at both welterweight and middleweight before moving to the latter UFC division for good, whereas Covington was a UFC welterweight staple.