UFC 319: du Plessis vs. Chimaev was a mixed martial arts event produced by the Ultimate Fighting Championship that took place on August 16, 2025, at the United Center in Chicago, Illinois, United States. A UFC Middleweight Championship bout between current champion (also former KSW Welterweight Champion) Dricus du Plessis and undefeated contender Khamzat Chimaev headlined the event.