240 has lost a preliminary bout with less than 48 hours to go until fight time because of a failed drug test.

officials late Thursday confirmed an initial report by MMAJunkie that Giacomo Lemos failed a drug test, forcing the cancellation of his 240 Early Prelim bout with Tanner Boser.

The substance for which Lemos tested positive has yet to be publicly identified.

Both fighters were slated to make their Octagon debuts at 240.

Lemos has a 6-0 record, having fought across and South Korea, while Boser is 15-6-1, fighting primarily across .

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240 is expected to move forward with 11 bouts, pending the outcome of Friday’s weigh-in, with featherweight champion putting his belt on the line against former lightweight titleholder . Cris Cyborg enters the final fight of her contract by facing Felicia Spencer in the 240 co-main event in , , .