Dominick Reyes will be fighting for a title next month…

The 30-year-old Mexican American professional mixed martial artist will face off against Jan Blachowicz for the UFC light heavyweight title vacated by longtime champion Jon Jones.

A bout between Reyes and Blachowicz had already been set for UFC 253 on September 26. But the UFC made it official: the two top contenders will be going for the vacant light heavyweight title.

Reyes (12-1), ranked No. 3 in the world by ESPN among light heavyweight fighters, is coming off a controversial, unanimous-decision loss to Jones at UFC 247 in February. It was a bout many thought the California native should’ve won on the scorecards.

Blachowicz (26-8) has won three straight, the most recent a first-round knockout of Corey Anderson in February. The 37-year-old is ranked No. 4 by ESPN at light heavyweight.

This will mark only the second time that the UFC light heavyweight title will not be in a card’s main event. The first was Daniel Cormier‘s title defense against Volkan Oezdemir at UFC 220 on Jan. 21, 2018.

UFC 253 will be headlined by a middleweight fight between champion Israel Adesanya and challenger Paulo Costa.

Jones had held the light heavyweight belt off and on since 2011 and never lost it in the cage. The champion expressed his intent to move up to heavyweight.