Slip caused Aldo injury

Aldo's title defence against Conor McGregor at UFC 189 on July 11 is in doubt after he broke a rib in training on Tuesday.

Alcides Nunes was the unfortunate man who inflicted the damage, and he has spoken out about how the injury happened.

"I threw a kick but slipped with all the sweat on the mat, and ended up hitting his rib," Nunes told "I was mimicking McGregor’s unorthodox style, things he does in the fight. I’m also left-handed, my style is similar to his, so that’s why they asked me to be part of his camp, but I ended up slipping and causing this injury."

It is not yet clear whether Aldo will be forced to pull out of next month's fight, but should he be forced to do so, Nunes admits that it would be a big blow.

"I’m still sad about all this," he said. "As a fan and an athlete, I know this is devastating. I’m really sad. Aldo was in shape and prepared for this fight."

Aldo is 25-1 heading into the bout with McGregor, and has not lost in nearly a decade.