Costa, of Belo Horizonte, Brazil, revealed the surgery via social media Monday. He told ESPN the bursa became infected and was removed but he did everything he could to ensure he would still make the fight.
“I will not pull out of this fight,” Costa told ESPN via text. “I can beat him 99 out of 100 times. Only if the doctor doesn’t allow me. I want that fight.”
The middleweight matchup between Costa (14-2), a former title challenger, and Chimaev (12-0) is one of the most anticipated fights of the year. Neither one has fought in 2023.
Costa was last seen winning by decision over former champion Luke Rockhold in August 2022. Chimaev hasn’t fought since he missed weight for a scheduled bout against Nate Diaz and ended up fighting Kevin Holland instead last September.