You can get DQ'd for 3 cautions for not engaging/fleeing. When the last pushout occurred, there were 2 cautions up on the board for Nick. I believe he was given the 3rd on the last push out, because he was going backwards again. The ref was giving him a hard time about backing up, so that's what I believe happened. It really was a function of the Iranian's style. He would tie up with Nick, force the underhook, gain leverage and push Nick back, so Nick was going back a lot. Nick also was moving backwards to avoid the tie ups; he wanted to work from a little more space. Credit to the Iranian, though, he had something going that Nick couldn't stop and he kept using it. Not the most exciting thing to watch, but it was effective.