An Opportunity

Void didn't hold the Wolf to a stalemate, he was straight up beating it black and blue. They were not on the same level. 

Grey, on the other hand, was fighting with the man, at a disadvantage, but he was still able to hold his own. He knew there was no way the man would make a mistake for him to capitalize on, so he was trying to create a chance for Klaus. 

If Klaus used his ice needle, he would be able to deal a great deal of damage to the man, he might even be able to incapacitate him for a short time, giving Grey the chance he needed to take him down. 

The man was fighting cautiously. After seeing Void appear out of thin air, he didn't carelessly brawl with Grey since he didn't know what might appear out of thin air again.