Although Sakura had taken Chinatsu's advice and trained seriously, her training had been nowhere near the same level as Naruto's and Sasuke's.
Sakura could be considered a fairly outstanding graduate, but Naruto and Sasuke had both reached the level of elite Chunin. Working together, they probably couldn't be stopped by anyone below Jonin.
Sakura: And here I thought I'd caught up a little...
After being struck by Sasuke's Great Fire Annihilation in midair, Kakashi landed amid the white smoke of the explosion. He looked rather disheveled. This wasn't how he'd imagined things playing out.
"How did your big sister teach you? You're a pair of little monsters." Kakashi awkwardly dusted himself off. Although he hadn't suffered any real damage, one surprise after another had stripped away every last bit of his dignity.
I can't use the Sharingan against a couple of kids, so conventional methods... What am I doing? These two aren't ordinary kids. I'll have to show some real skill!
Kakashi took a deep breath, preparing to get a little serious.
He rapidly formed hand seals and used the Shadow Clone Technique. With a couple of pops, three or four shadow clones of Kakashi appeared around him.
"Fire Release: Great Fireball Technique!"
Countless enormous fireballs shot forth, their flames surging like an overwhelming tidal wave. Kakashi would never have used an attack on this scale against graduates who couldn't use the Body Flicker Technique, but he didn't believe Sasuke and Naruto hadn't learned it.
Wait, haven't I forgotten something...?
Sasuke knows it, and Naruto probably does too, but Sakura...
Oh, no!
Kakashi only realized after unleashing the technique, while Naruto and Sasuke immediately stepped in front of Sakura, choosing to meet the attack head-on.
"Lightning Release: Black Lightning: Black Panther!"
Sasuke rapidly formed hand seals and unleashed the ninjutsu