| 25 January 2020

Curtis Blaydes, Junior dos Santos, Michael Chiesa

UFC Fight Night 166: Blaydes vs. dos Santos was a mixed martial arts event produced by the Ultimate Fighting Championship that took place on January 25, 2020 at PNC Arena in Raleigh, North Carolina, United States. A heavyweight bout between Curtis Blaydes and former UFC Heavyweight Champion Junior dos Santos served as the event headliner.