UFC Bantamweight Champion TJ Dillashaw has been forced to withdraw from his upcoming title defense at UFC 186 due to injury.

The news came from UFC President Dana White during an interview with KRRL FM in Los Angeles.

Dillashaw, who was scheduled to face former champion Renan Barão at the event on April 25 in Montreal, is said to have suffered a fractured rib in training.

He offered a message to fans via his Instagram page:

First of all I want apologize to all my fans and everyone looking forward to this fight. I unfortunately had to pull out of the fight do to a fractured rib. Just a freak accident during wrestling practice. This is heart breaking to me because I was looking forward to this fight and never want to be a fighter having to pull out of a fight. I will heal up quick and come back as soon as I can. Thx for the support

Dillashaw and Barão fought for the first time last May, with Dillashaw scoring a dominant TKO victory to lift Barão’s 135 lb title. A rematch was scheduled for August of last year, but Barão was forced to withdraw a day prior to the bout. That day, the former champion was admitted to the hospital as he tried to make weight.

With the bout again cancelled, Demetrious Johnson’s UFC Flyweight Championship defense against Kyoji Horiguchi has been elevated, as the UFC puts it in a report on their official site, to the main event. A lightweight bout between Abel Trujillo and John Makdessi has been moved from preliminary bouts to the main card, as well.