Lyoto Machida vs. Dan Henderson canceled after Machida admits taking banned substance

The Lyoto Machida-Dan Henderson rematch scheduled for Saturday's UFC on FOX 19 card in Tampa is off.

The UFC announced the change on Wednesday after Machida, the former UFC light heavyweight champion, declared the usage of a banned substance during an out-of-competition drug test administered by USADA last week.

According to the press release, Machida said he was unaware the substance, which has not been revealed, was prohibited both in and out of competition.

"The UFC organization was made aware today by the U.S. Anti-Doping Agency (USADA), the independent administrator of the UFC Anti-Doping Policy, that Lyoto Machida declared the usage of a banned substance during an out-of-competition sample collection last week," the UFC stated. "Machida stated that he was unaware that the substance was prohibited both in and out of competition and, in accordance with the UFC Anti-Doping Policy, his disclosure of usage will be taken into consideration by USADA during any potential results management and adjudication process."

As a result, the UFC pulled the bout, which would have been a rematch of a Machida decision win at UFC 157, from Saturday's card. The UFC said it will find another bout for Henderson "in the near future." Henderson, 45, is on the last fight of his UFC contract.

Henderson revealed his thoughts on the news on Twitter.

P.O.S. -No respect https://t.co/03O5oM7sM9

— Dan Henderson (@danhendo) April 13, 2016