Kevin Hart -- I Believe In Ronda ... Show Us What You're Made Of

Remember "Rocky III" when Rocky gets knocked the hell out by Clubber Lang -- but then refocuses, gets his crap together and beat Mr. T's entire career into oblivion?

Yeah, that's sorta what Kevin Hart thinks is gonna happen with Ronda Rousey.

Dude was trying to tell us how every champion gets tested ... a low moment ... and this is clearly Ronda's low moment.

So ... will she be Rocky in "Rocky III"?? Or will she be Drago?