Ross Pearson said to sources recently that he has reasons why he did not shake hands with George Sotiropoulos at UFC on FX 6 after his third-round TKO victory, a recent report has revealed.

As per the findings, Pearson has complaint against Sotiropoulos. He has told that Sotiropoulos punched his assistant boxing coach off-camera during a Twitter beef between the Aussie and him. Sotiropoulos was then knocked out by Erin Beach, who is the boxing coach.

It has been found that where Pearson use to have his fight camps, Beach works out of the San Diego's Alliance MMA training center. He could not come to comment over the same. Pearson has knocked Sotiropoulos down many times on FX 6 headliner in the UFC.

It was then that he cinched his victory with a stiff jab, which had taken Sotiropoulos in the third round off his feet, the report says. It is thus that on "The Ultimate Fighter: Team Australia vs. Team U. K", the two acted as opposing coaches.

"That's why I said I lost all respect for him and that's why I didn't shake his hands afterwards. That's why I'm not his friend now - because he acted unprofessional", Pearson was quoted as saying.