Yeah, but they don't mean anything. No title fights. No title shot fights. No battle of two undefeated guys. I mean, Bisping beating Rivera (a journeyman at best) is about as inconsequential of a co-main event as there can be. Entertaining? Sure. But so are most Fight Night cards. PPV cards should have something noteworthy going on.
Fitch had Penn pressed up against the cage for the majority of the beginning of the first. He couldn't get the takedown. Penn goes for his own takedown, lands it, and gets the back. Fitch is defending from the back for a good 90 seconds before rolling into Penn. Back to the feet and against the fence. Round 1 over.