John Locher/Associated Press

Demetrious Johnson will be in the main event of UFC 215 on Sept. 9, defending the UFC flyweight championship against Ray Borg. 

UFC President Dana White told TSN on Thursday that Johnson vs. Borg would headline the show, with UFC women's bantamweight champion Amanda Nunes defending her crown in the co-main event against Valentina Shevchenko.

The Nunes-Shevchenko bout was originally scheduled to take place at UFC 213, but Nunes withdrew from the fight on the day of the show due to an illness. 

Johnson and White have been waging their own war through the media, with Johnson accusing White of using bully tactics because he wanted a fight against Sergio Pettis. 

White responded to Johnson in an interview with TMZ Sports, saying the flyweight champion "absolutely refuses to fight" T.J. Dillashaw and said Johnson "wasn't very confident in his abilities to sell Pay-Per-Views."

With that apparent bad blood in the rearview mirror, Johnson will put his title and 12-fight winning streak on the line against Borg. The 23-year-old owns an 11-2 career record, is UFC's third-ranked flyweight and is the highest-ranked 125-pound fighter Johnson hasn't already defeated.