Chuck Liddell vs Rampage Jackson is my guess
Fighter A(the champ) takes on the popular rising star Fighter B
A comes out willing to trade but is slowly being picked apart by B. Fighter B throws leg kicks and great combinations, really picking apart B. B then goes for a inside leg kick which ends up sliding up and hitting A(Champ) in the parts lol. After giving the champ time to recover they are ready to go again after about another 30 seconds fighter b throws the same kick with the same result. When they start back up fighter B finishes the round with a superman punch making the Champ fall and almost get gnped out but the bell rang.
Rd 2 much of the same Fighter B picking apart the champ and landing a Lhk to the head and following with great gnp to become the new champ. Guess which fight?