But she isn't angry, and Itachi isn't trying to make her angry cus he was to assess her skills and practice himself. He'd save the taunting for the next time.

Itachi's a ninja elite brat who was expected to be perfect at everything and was. Who knows the countless hours of training he's put in. =_= It might just come down to arm and leg reach. Itachi's 5'9 [at 20, so probably 5'7ish at 16] and Tatsuki's what, around 5'3-5'5? ::doesn't wanna look it up::]

Might as well say it's draw, since Itachi isn't really trying to show her everything he's got. A draw or he simply withdrew when he was satisfied.

ITachi won't underestimate her or stare at her nonexistent boobs.