Alexander Volkanovski defended his featherweight title with a bloody, tumultuous unanimous decision over Brian Ortega, and Valentina Shevchenko defended her flyweight belt with a fourth-round stoppage of Lauren Murphy at UFC 266 on Saturday night. Nick Diaz also lost his first mixed martial arts fight in nearly seven years, declining to go on after Robbie Lawler knocked him down with punches early in the third round at T-Mobile Arena. Volkanovski survived a spectacular third round in which both fighters appeared to be moments from finishing the other.