Junior dos Santos has kept quiet in regards to word that his opponent for the UFC heavyweight title, Alistair Overeem, has failed a pre-fight drug test for elevated levels of testosterone.

Dos Santos and Overeem were set to meet in the main event of May’s UFC 146 card from Las Vegas, but if Overeem is unable to provide a positive test sample, he’ll likely not get licensed to fight on the card.

In a statement posted on Twitter, dos Santos’ management team wrote, “The UFC has made no announcement regarding (dos Santos’) fight. We have no comment, this matter falls solely to (Nevada) Commission & UFC.”

Rumors of a possible replacement for Overeem have been floating around since news of the test was released on Wednesday. Frank Mir is a likely candidate, as he has a planned No. 1 contender bout with Cain Velasquez set for the same night. Dos Santos won the title from Velasquez, so there is always a chance he is given a rematch, as well.