Qui-Gon's countenance remains stoic throughout their duel, any hints of pride completely absent from his face. But he has to work hard to keep it that way. Ezra's excitement is contagious, and, more importantly, present. His resolve is as palpable as always and their shared eagerness to learn can be felt in every flourish of their blades.

Then again, what else could Qui-Gon expect from his adopted son?

He's thrown off by Ezra's agility (his skills have been sharpening exponentially with each lesson) and has to rely on the Force to augment his movements' speed to counter his Padawan's twist. He has no choice but to return to a defensive stance, shoulders hunched to keep his blade low and to hide the taxation this spar is having on his body.

A lesser teacher would worry about a potential bruising for their ego, but Qui-Gon couldn't be prouder.