LOS ANGELES, Calif. -- Reality TV might give some people headaches, but it can apparently also give you a concussion too, as Rob Kardashian found out the hard way.

But now, the man who knocked down the reality star in a charity boxing event is fending off cheap shots that he was a "dirty fighter."

So what does he say to AccessHollywood.com?

The couple, who are set to tie the knot on Sunday, were spotted at celeb hotspot Playhouse Hollywood on Friday night, toasting with tequila and dancing.