The two crime fighters agreed that Robin should go at her first to see what she's capable of, it was a very small but somewhat heated argument. They were like brothers to each other, so it was the back and forth for a second silently, until Dick glared at him, indicating that his words were law.

The two started to fight for quite a while, Nightwing watching every move, but letting Robin give her tips while fighting. He couldn't help but feel the weight of dread as when they activated the clock tower, they also activated the suit racks. It always had a suit ready just in case they needed it... Especially the iconic Batman one. The cowl was empty but he could see where Bruce's square jaw and blue eyes would fit in perfectly. It was as if he was watching her fight too. He had to take a chance on Abbie. He didn't know why, but he felt compelled to help her. Abbie said something about protecting someone she loves, which made everyone hesitate for a second, letting Abbie hit Tim in the face. Nightwing smirked a bit and clapped from the corner of the mat. 

"Alright tough guy, tap me in." He said mockingly at Robin as he got up and slapped Dick's hand. "Alright now that you're warmed up, time for the main event." Nightwing got into fighting stance, his hands out. "For example, never strike first, playing defense in the very beginning will open up a lot more opportunities to you, how they fight, what their favorite hand is, whether they dodge or counter." Nightwing explained, and without warning he leapt at her with lightning speed, swinging a fist but also lifting up a knee, curious to see how she would handle it. 

"Who taught you to fight, by the way?" Robin asked from the corner of the mat, his arms crossed, obviously a little upset that he got hit.