The much-anticipated Conor McGregor-Jose Aldo fight next month could be in jeopardy after it emerged that Aldo may have fractured a rib in training.
A well-known MMA sports correspondent Anna Hissa has claimed the injury occurred yesterday morning.
UFC have already invested a lot in the fight and could stand to lose millions if Aldo is forced to withdraw.
It is unlikely the champion will be able to recover from a fractured rib by July 11, if the reports are confirmed.
The alternative is to reschedule the fight for a later date or to approach another contender to take Aldo's place.
However, this will be a huge upset for Irish fans who have already booked flights, accommodation and tickets for the aforementioned date.
According to Brazilian news organisation Globo, Aldo was taken to hospital following the injury where he underwent two tests, including a CT scan which confirmed the fractured rib. The usual required amount of time needed to recuperate from such an injury is three to four weeks.