ULTIMATE fighting star Conor McGregor's world title bout has been put in jeopardy after his opponent sustained a suspected broken rib in training.
The Dubliner is set to clash with Jose Aldo in Las Vegas next month, but the fight now depends on the Brazilian's doctors giving him the okay.
The pair have been trash-talking each other for months ahead of the much-anticipated face-off in the UFC octagon.
"Just know that it is business as usual up here at the top. See you all on July 11th," McGregor posted on Twitter this morning.
He included a picture of himself doing the splits.
UFC chief Dana White meanwhile has moved to quell fans' fears about the fight, also taking to social media to say: "Relax everyone".
But sources have told the Herald that the injury is a serious issue and Aldo will see a doctor in Brazil tomorrow to determine if he is able to proceed with the July 11 title fight in Vegas.
UFC has already invested heavily in the fight and could stand to lose a lot of money if Aldo is forced to withdraw.
The alternative is to reschedule the fight for a later date.
However, this will be a huge upset for Irish fans who have already booked flights, accommodation and tickets.
Irishman Joseph Duffy, the only man to beat McGregor, has offered to step up and fight him but a more likely option is Frankie Edgar.
Should Aldo be ruled out of next month's fight, he will be out of action until October. "I was with him the whole afternoon. He's heartbroken. He wants to fight anyway," his trainer Andre Pederneiras said on TV.
"Now we have to wait for the exam results. Aldo is in deep pain," he added.
"If the fracture is really confirmed, Aldo will have to stop training, do nothing for three or four weeks until it's fixed, and then he would be able to do any exercise without forcing his rib.