Alex tried to quickly end the fight, by slashing at Richter's head, but the moment he did so the Richter's dead body evaded his attack. Richter then proceeded to attack Alex rather sloppily. The speed and strength were beyond what Richter showed Alex while fighting him, but there was no longer any trace of Richter's exquisite technique or control. It seems like the nanomachines are truly controlling Richter's body and can release its full potential, but all the techniques Richter polished to perfection were now gone.
It was like fighting a ten-year-old who was in a martial art master's body. Still, Alex was already exhausted both physically, emotionally, and mentally from the last battle, which made this battle harder than it was supposed to be.
