Makhachev vacates title; Topuria-Oliveira set for UFC 317; and Du Plessis-Chimaev meet at 185 at UFC 319

UFC CEO Dana White took to social media on Tuesday to announce a slew of fights and related news, headlined by Ilia Topuria facing Charles Oliveira for the vacant lightweight title in the main event of UFC 317 on June 28 at T-Mobile Arena in Las Vegas. White also announced that middleweight champion Dricus Du Plessis will defend against Khamzat Chimaev on Aug. 16 at UFC 319 at the United Center in Chicago.

White added that Islam Makhachev has officially vacated the lightweight title and will fight newly crowned welterweight champion Jack Della Maddalena later this year.

White also announced:

• Flyweight champion Alexandre Pantoja will defend against Kai Kara-France in the co-main event of UFC 317.

• Former middleweight champion Robert Whittaker will face Reinier De Ridder on July 26 in Abu Dhabi, a card that will be on ABC in the U.S.

• Paulo Costa will fight Roman Kopylov at UFC 317.

• Renato "Money" Moicano will meet Beneil Dariush at UFC 317.

• Shara "Bullet" Magomedov meets Marc-Andre Barriault in Abu Dhabi.

During his livestream, White reiterated his confidence that the heavyweight title fight between champion Jon Jones and interim champion Tom Aspinall will get finished. It's most likely to be held in November at Madison Square Garden in New York.