Hip Hop star Russ got into a fight - with another rapper named GuapDad 4000. The fight took place backstage at a concert in San Antonio Texas on Friday, MTO News has learned.

And Guapdad 4000 is telling fans his side of what happened. 

According to Guapdad, Russ pulled up on him backstage and sucker punched him. Then, Guapdad claims, Russ ran off into his trailer - while the rapper's security continued to attack Guapded.

But Guapdad - who is from Oakland - fought back, and managed to escape the beating.

Now he's looking for revenge. Guapdad went on social media yesterday - and challenged Russ to a fight - on camera.

For those who don't know - Russ is a rapper, singer, songwriter and record producer. He is known for his singles "What They Want" and "Losin Control", which peaked respectively at number 83 and 63 on the US Billboard Hot 100.

His twelfth studio album, There's Really a Wolf, was released on May 5, 2017, and was certified Platinum on April 18, 2018. Outside of his solo music, he is part of the Diemon Crew, a rap group.

Here's Guapdad 4000 explaining what went down:

"You thought it was cool to ask me to talk to me about a song that you didn't like that's on my album," Guapdad begins in an extended IGTV clip. "You said, 'Hey let's talk about this song.' I turned around and you snaked me. Then, ran in your trailer and had your security try to beat me up. Your security couldn't get me, then your partners tried to chase me and then they got beat up by the fence."

He would go on to remind Russ that he is, in fact, from Oakland, using his hometown as a valid calling card for his proverbial hands. He would then issue an ultimatum to Russ, requesting that the rapper fight him on camera.

"Either you circle back and try to fight me on camera--but if you were so bold to do this in front of everybody in random San Antonio, Texas, you could [...] You snaked me. You got me. But when it comes to hands, you know you don't wanna see me because your partners didn't even wanna see me and I'm the skinniest ni--a in San Antonio, Texas.