UFC 294 was supposed to hold the rematch of Charles Oliveria vs Islam Makhachev as well as Paulo Costa vs Khamzat Chimaev. Just over a week before the event was set to take place, both Oliveira and Costa pulled out of their fights. Costa had an infection and Oliveria was injured during a spar in his training camp. In replacement, Dana White has called up two of the most dangerous men on the planet, Alexander Volkanovski and Kamaru Usman.