From episode eight.
spoiler
Yukine’s arc here is anime-original. Notably, this scene is more-or-less lifted from the Tomoyo After VN, making this the closest we can get to an adaptation of it (unless by some miracle we get an actual Tomoyo After anime, which I would really love to see)
I guess they’re not glowing, and there’s kicking when the opponent is down, but professional matches only last a few minutes, so this fight that lasts through a sunset after some very serious head trauma definitely needs the anime qualifier.