Brock Lesnar ended this year's SummerSlam at the Barclays Center in Brooklyn, N.Y. by driving his elbows into Randy Orton's skull and doing enough damage to force Orton to get ten staples in his head after the show:

It's still unclear whether or not Lesnar was supposed to do that, but at least one of his fellow wrestlers was reportedly very upset with him when he made his way backstage. According to multiple reports, Chris Jericho called Lesnar out for what he did to Orton after his match and nearly got into a fight with him before other WWE wrestlers and executives stepped in and stopped the two men from going at it.

According to Dave Meltzer of Wrestling Observer, the feud started after Jericho made a comment as Lesnar walked by him after SummerSlam ended:

"Jericho said that’s bullshit just as Lesnar came back from the ring. Lesnar thought he was talking about his match, and called Jericho a pussy according to one version, or “shut up” according to another, and to mind his own business. The two got face-to-face and started exchanging words, with one version saying they were shouting at each other the whole time."

From there, Meltzer reports, things got even more tense and nearly got physical:

"Lesnar pushed Jericho with his fingers, and Jericho did what was described as the “Rousey-Tate” forehead press. One version also had Jericho shoving Lesnar to the wall at one point."

Lesnar and Jericho reportedly got "tangled up" with Lesnar telling Jericho to either "punch him or kiss him" before the two were pulled apart by Triple H. Later, after reportedly going at it for a second time, they had to be separated by Vince McMahon, who told Jericho that it was "all a work and to be professional."

According to reports, Orton eventually told Jericho that he knew about everything that was going to happen at SummerSlam in advance. But it sounds like Lesnar and Jericho should probably keep their distance for the time being after what went down at SummerSlam.