Yeah in there is two ways to beat him one where the police chicks saves you and the other where you beat him wihout help and it depends on various things principaly you need to finish training (Literally this is for almost all fights) and depending of the choices in the figth, it haves a internal score of the choices that you make and you obtain one of the two ways depending on this, i think it was 3 points for the ending where the police chick helps you and 4 for the one where you beat him alone and you obtain a relantioship point with niko (The teleporter chick), if you have 80 power and 19 skill it gives you two free points and the decisions let you obtain 3 more so you can beat him wihout having the necesary stats but not obtaining the perfect against him, i will write the decisions below if someone doesnt wants to see them.
1. Keep your distance
2. go all out
3. i dont need to evolve
and you win.