Ben quickly moved his other hand once he saw him comming back up in a strike to his head, blocking the strike with his own Knife just before it made contact with his head. Ben also used the closeness to try to jam his right knee into the other man's stomach in an attempt to wind him and buy himself some time.
If Ben was concerned about this fight it did not show on his face, instead there was only cold calculating logic behind his eyes, evaluating, it is almost as if his cold gaze could peirce the soul of the applicant.