Brock Lesnar’s issues with the U.S. Anti-Doping Agency are just getting started.

Less than one week after Lesnar was flagged by USADA for a failed out-of-competition drug test ahead of UFC 200, the UFC was notified of another failed test, this time from an in-competition sample collected at UFC 200 on July 9.

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According to a statement released by the UFC on Tuesday, Lesnar’s in-competition test came back positive for the same substance as his previously announced out-of-competition sample taken on June 28. The exact substance was not revealed.

The Nevada Athletic Commission has jurisdiction over the case since the fight took place in Las Vegas. Lesnar, 39, faces at least a two-year ban from the UFC, but his case will receive due process before any suspension is handed down.

Lesnar, who returned to MMA at this month after nearly five years away from the sport, is still under contract with WWE but was given a one-off chance to fight at the milestone event. Lesnar beat Mark Hunt by unanimous decision.

He is scheduled to return to WWE at SummerSlam on Aug. 21 against Randy Orton.