Posted by Ryan Matsunaga @ryanmatsu
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Ryan Matsunaga

Yesterday, the UFC announced that this weekend's UFC on FOX event had lost its main event. Originally, former champions Lyoto Machida and Dan Henderson were set to meet in a middleweight match-up. Unfortunately, less than a week before the fight, Machida self-reported to the USADA that he had used a banned substance.

Machida's punishment has not yet been decided on, although it is very likely he will be facing a suspension from competition of some kind. In the meantime, Machida is being surprisingly open about the news, and released his own statement explaining his side of the story.

In a statement on Facebook, Machida revealed which banned substance he was using. Machida stated that he was using a workout supplement called 7-Keto, which contains a banned substance called DHEA.

He added that he was not aware it was on the banned list, as it had only been added in 2016:

"I'm here to tell you that I was caught by surprise by this news. It has been very difficult for me. I've trained a lot for this fight, I've dedicated a lot with all my teammates. I want to tell you that I really didn't know about this substance, so I listed it on my declaration form amongst everything else I was taking, and this substance was recently banned in 2016, so I take the blame for not knowing that, and I'd like to say I'm really sorry and apologize to my fans, teammates, and my family... I always try to play by the book, but unfortunately this happened."

UFC on FOX 19 will now proceed without Machida or Henderson.