John Dodson was arguably Demetrious Johnson's toughest test. Now, Johnson will have to take it again.
Johnson will defend his flyweight title against Dodson in the main event of UFC 191 on Sept. 5 in Las Vegas, the UFC announced during UFC Fight Night: Mir vs. Duffee on Saturday night.
Johnson (22-2-1) has rounded into one of the most dominant champions in the UFC, but Dodson took two rounds from him when they met in January 2013. Johnson, 28, has won eight straight fights and is coming off a fifth-round submission win over Kyoji Horiguchi at UFC 186 back in April.