After all the uncertainty of the past week, it appears this month’s highly anticipated rematch won’t be happening after all. But it won’t be for the reason anyone initially thought.

Light heavyweight champion Daniel Cormier (17-1 MMA, 6-1 UFC) is out of his main event fight against former champ Jon Jones (21-1 MMA, 15-1 UFC) at UFC 197 with a foot injury. A person with knowledge of the injury confirmed the news to MMAjunkie.

The person spoke on condition of anonymity because he was not authorized to speak publicly on the injury. The news first was reported by BJPenn.com. The UFC has not yet made a formal announcement of Cormier’s injury.

UFC 197 takes place April 23 at MGM Grand Garden Arena in Las Vegas. The main card airs on pay-per-view following prelims on FOX Sports 1 and UFC Fight Pass.

It is not yet known if Jones will remain on the card against a new opponent, or if he will be pulled from the event to wait for Cormier to heal and be rebooked on a future card. The extent of Cormier’s injury is not known.

UFC 197 already had a second title fight in the co-main event. Flyweight champion Demetrious Johnson (23-2-1 MMA, 11-1-1 UFC) will look for his eighth consecutive title defense against undefeated challenger Henry Cejudo (10-0 MMA, 4-0 UFC). Johnson told MMAjunkie he’s prepared to move into the main event if needed – which would be the fourth straight time he’s been scheduled for a co-main event only to be elevated to the headliner.

Jones and Cormier first fought at UFC 182 in January 2015, when Jones retained his title with a unanimous decision – only to be stripped of the belt and suspended a few months later after his involvement in a hit-and-run accident. Cormier then won the vacant title with a second-round submission of Anthony Johnson.

Jones was suspended by the UFC during his legal troubles, but was reinstated earlier this year and booked for his rematch with Jones and an attempt to regain his title. But this past week, Jones ran afoul of the law for a second time while on probation. He was given five citations in Albuquerque, N.M., among them a charge of drag racing.

When he turned himself in to police on Tuesday, he was arrested and jailed for a probation violation and held without bond. On Thursday, after nearly two full days behind bars, Jones appeared in court and reached a plea deal that has him unable to operate a motor vehicle without the permission of his probation officer.

His time in jail this week had many questioning if the UFC 197 main event would remain intact thanks to his legal trouble. But as it turns out, Jones was fine to stay on the card – but Cormier was not.

The UFC 197 lineup includes:

MAIN CARD (Pay-per-view, 10 p.m. ET)

Jon Jones vs. TBA Champ Demetrious Johnson vs. Henry Cejudo – for flyweight title Edson Barboza vs. Anthony Pettis Rafael Natal vs. Robert Whittaker Andre Fili vs. Yair Rodriguez

PRELIMINARY CARD (FOX Sports 1, 8 p.m. ET)

Chris Kelades vs. Sergio Pettis Carla Esparza vs. Juliana Lima Danny Roberts vs. Dominique Steele Glaico Franca vs. James Vick

PRELIMINARY CARD (UFC Fight Pass, 6:30 p.m. ET)

TBA vs. TBA Clint Hester vs. Marcos Rogerio de Lima Efrain Escudero vs. Kevin Lee

Stay tuned to MMAjunkie for more news on this story as it becomes available.

For more on UFC 197, check out the UFC Rumors section of the site.