Tessa just smirked. In her mind, that meant that there was a chance he'd cry. Which could be pretty hilarious to see, on her end, though not really her intention. She just liked to win, even when they were just sparring. If she landed a few good blows on him - and she would, she already knew that - she'd be happy.
Better if she could knock him down, though, too. Girl had to use what strength she had to her advantage, after all.
Wait, he found it hard to fight a girl? Oh, this could be fun. "Can't say the same, I spar with guys all the time. Don't worry, you can't hit me hard enough to break me." She'd dealt with it all in practice and took it in stride. The way Tessa saw it, it was part of the risk you took when you decided to spar with someone. Sometimes, people got kicked in the face and it sucked for a while, but you got back up and kept fighting. End of story.
Dropping her bag to the ground, Tessa shrugged out of her sweatshirt, wanting a bit more freedom in her movements. Also, because she liked that shirt and she'd get pissed if it burned up on accident. Seeing the flames on his hands, she grinned and lit her own flames, curling around her fingertips. "Let's see what you can do."