Chad Mendes broke his right thumb early in the first round of his fight against Conor McGregor Saturday night in Las Vegas.

According to Mendes' manager Mike Roberts of MMA Inc., Mendes was informed of the break after visiting with his doctor Monday afternoon. He is expected to find out later this week whether the injury will require surgery or not.

Mendes lost via second-round TKO to McGregor at UFC 189 in an interim UFC featherweight title fight. Mendes agreed to fight McGregor on less than two weeks' notice.

Below is an X-ray of Mendes' broken thumb, provided by MMA Inc.