An injury has knocked a high-profile fight from the UFC’s return to Atlantic City next month.

Paulo Costa (11-0 MMA, 3-0 UFC) today said a biceps tear has forced him out of a middleweight fight against Uriah Hall (13-8 MMA, 6-6 UFC) at UFC fight Night 128. UFC officials had not yet made the matchup official, so likely won’t make an announcement of the injury. It is not clear if Hall will remain a part of the card against a new opponent.

UFC Fight Night 128 will take place April 21 at Boardwalk Hall in Atlantic City, N.J. The main card will air on FS1 following prelims on FS2 and UFC Fight Pass.

Costa announced his injury on Instagram today, linking to a report from Combate, which cited news first reported by Canal Encarada. Costa said he expects to be back in June.

“This is not good news for my fans,” Costa posted on Instagram. “I had a serious injury, partial breaking of bicipes ligament. I know that you are excited to see me again and I am too , but i need some more time to return to show all my potential to you in the cage, soon you will see me again. probably in June. God bless. God bless.”

Costa stayed perfect this past November with a second-round TKO of former welterweight champion Johny Hendricks at UFC 217 in New York. It was his third TKO finish in three UFC fights.

He debuted with the promotion nearly a year ago in his native Brazil and picked up a $50,000 bonus for a first-round TKO of Garreth McLellan. That gave him nine first-round stoppages in his first nine pro fights, with eight coming by knockout or TKO. He had to go to the second round for a TKO of Oluwale Bamgbose at UFC 212 this past June in Rio de Janeiro before making his first trip for a fight in the U.S. against Hendricks.

Hall was to return a few months after suffering medical issues that sent him to the hospital ahead of weigh-ins for a scheduled January fight. Those issues, Hall said, were a “mini-seizure” and “slight heart attack” during his weight cut for UFC Fight Night 125 in St. Louis. Hall was pulled from his fight against Vitor Belfort and criticized by UFC President Dana White.

Hall was trying to make it two straight with his booking against Belfort in January before his medical incident. At UFC Fight Night 116 in Pittsburgh this past September, he picked up a performance bonus for a second-round knockout of Krzysztof Jotko. That snapped a three-fight skid that saw him drop a decision to Robert Whittaker and suffer first-round TKOs against Derek Brunson and Gegard Mousasi in 2016.

The latest UFC Fight Night 128 card includes:

• Edson Barboza vs. Kevin Lee
• Corey Anderson vs. Patrick Cummins
• David Branch vs. Thiago “Marreta” Santos
• Alex Garcia vs. Ryan LaFlare
• Brett Johns vs. Aljamain Sterling
• Dan Hooker vs. Jim Miller
• Magomed Bibulatov vs. Ulka Sasaki
• Siyar Bahadurzada vs. Luan Chagas
• Tony Martin vs. Keita Nakamura
• Merab Dvalishvili vs. Augusto Mendes
• Aspen Ladd vs. Leslie Smith
• Uriah Hall vs. opponent TBA

For more on UFC Fight Night 128, check out the UFC Rumors section of the site.