The last four

The audience fixed their gaze on the match with much anticipation and excitement as the air was charged with pulsating energy. 

In the ring, the gray robot watched as Nova's powerful punch came flying toward its face and tried to evade the attack using its movement skill but what happened next left everyone dumbstruck.

Just as the gray robot wanted to evade the punch, it realized its movement was getting slower by the second, while also, Nova punch seemed to follow every bit of its movement. 

It was like there was no room for the gray robot to escape. The strong metallic punch seems to cover the whole ring.

Bang! 

A punch in the face sent Grey flying crashing into the ring wire and collapsing to the floor. 

For a couple of seconds, everyone had their eyes widened and couldn't believe what just happened. 

They knew the gray robot was trying to escape but why would it slow down suddenly and be hit by Nova?