It's no secret that Alistair Overeem and Anthony Johnson do not like each other, but things are starting to get ugly between the former training partners.

Alistair Overeem Responds to Anthony Johnson's Comments

When news broke that Overeem was the man behind Jon Jones' injury, Johnson commented on the situation by saying Overeem had a reputation for bad training habits during their time at the Blackzillians fight camp in Florida. Jones suffered a torn meniscus and an ankle injury that forced him out of his Sept. 27 title defense.

Since leaving the Blackzillians, Overeem has settled with Jackson's MMA in Albuquerque, NM and has received praise and criticism from his new training partners. Overeem responded to Johnson's comments on Tuesday, saying Johnson is jealous of him.

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"Jealousy. I can't think of any other explanations. I have no relationship with the guy," Overeem told MMAJunkie. "All this talking to the media? I don't get. Where I come from, if I have a problem, I'm coming directly to you and I'm asking you what's up. For me, that's like p*ssy behavior."

Johnson saw the article and immediately responded on Twitter, calling out Overeem for ducking a fight with former heavyweight champion Junior dos Santos:

He followed that up with a second, profanity-laced tweet.

"How can Overs**t call me a p***y when he ducked JDS? Biggest p***y in the heavyweight division. I know the truth kid lol a cpl of us do!"

The two have both said they would be willing to fight each other. But first, Overeem will face Ben Rothwell in the co-main event of UFC Fight Night 50 on Friday. Johnson is competing as a light heavyweight and has his own potential opponents to worry about.