The UFC released a statement Tuesday following news that Fabricio Werdum failed an out-of-competition drug test earlier this year.

Werdum, who was rumored for the main event in Russia later this year, tested positive for a potential violation of the anti-doping policy in April.

“The UFC organization was notified today that the U.S. Anti-Doping Agency (USADA) has informed Fabricio Werdum of a potential Anti-Doping Policy violation stemming from an out-of-competition sample collected on April 25, 2018.

“USADA, the independent administrator of the UFC Anti-Doping Policy, will handle the results management and appropriate adjudication of this case involving Werdum. Under the UFC Anti-Doping Policy, there is a full and fair legal process that is afforded to all athletes before any sanctions are imposed. Additional information will be provided at the appropriate time as the process moves forward.”

Werdum, who will turn 41 in July, was knocked out by Alexander Volkov this past March, putting an end to his two-fight win streak. The Brazilian had scored wins over Marcin Tybura and Walt Harris in 2017.

Werdum took to Instagram to offer up his first statement on the failed test:

“Hey guys, I got up this morning to the news that one of my urine samples from April tested positive for a prohibited substance. I am working with my team, the UFC and USADA to understand what happened. I’ve always been careful with everything I take and I’ve always supported a clean sport. We will work hard to solve this misunderstanding and I hope soon to be able to go back to the octagon and do what I love.”

Fala galera Fui pego de surpresa com a notícia de que um dos exames colhidos pela USADA em abril deu positivo para uma substância proibida. Me coloquei à disposição da USADA e do UFC e estou trabalhando com a minha equipe para entender o que aconteceu. Eu sempre fui muito cuidadoso com tudo o que eu tomo e sempre apoiei o esporte limpo. Vocês podem ter certeza de que vamos esclarecer esse mal entendido e espero em breve poder voltar a fazer o que eu amo, que é lutar. ➖➖➖➖➖➖➖➖➖➖➖➖ Hey guys, I got up this morning to the news that one of my urine samples from April tested positive for a prohibited substance. I am working with my team, the UFC and USADA to understand what happened. I’ve always been careful with everything I take and I’ve always supported a clean sport. We will work hard to solve this misunderstanding and I hope soon to be able to go back to the octagon and do what I love

A post shared by Fabricio Werdum 🥇 (@werdum) on