The Big Letdown didn't happen. Yet.

Jose Aldo was rumored earlier this week to have broken a rib during training, putting his featherweight title defense against Conor McGregor at UFC 189 on July 11 in danger of being canceled.

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UFC announced Wednesday night it had "received official medical confirmation" that Aldo, from Brazil, has a bone bruise to his rib and cartilage yet plans to defend his title against the Irishman.

"With this news, Aldo has expressed that he has every intention of facing Conor McGregor at UFC 189," the UFC said in a statement.

But the UFC has a contingency plan in place should Aldo not be healthy enough to compete against McGregor in what has been billed as the biggest fight this year for the UFC, including anticipated pay-per-view buys.

Should Aldo not make it, top contender Chad Mendes would face McGregor for the interim featherweight title. Mendes (17-2, 8-2 UFC)) twice lost in title fights against Aldo. McGregor (17-2, 4-0) has become one of the biggest draws in mixed martial arts despite just four fights in the UFC -- and a year off in between the second and third bouts to recover from a torn ACL.

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Aldo (25-1, 7-0 UFC) is the only featherweight champion the UFC has known since it added the 145-pound weight class at the end of 2010. He hasn't lost a fight in close to 10 years.