Tsunade has better taijutsu..she is a taijutsu specialist and has incredible raw strength.
If your argument is correct, than any sharingan user can beat the best taijutsu specialist just because he can predict his moves..no, he can predict them, yeah..but is he going to be able to react and counter effectively for each move? No.
Why? Because Itachi's taijutsu < Tsunade's taijutsu
I apologise for being rude but I just can't help myself, this is the most complete and utter bull crap I have ever heard, you think this slow as bitch can even land a hit on Itachi? She couldn't even keep up with pre shipuuden Kabuto for kami's sake, Kabuto blitzed her in no time at all and the only reason she didn't die is because they were trying not to kill her but to capture her so that they can force her to heal oro's hands.
She did land a hit on Kabuto after that but that was only after he let his guard down and started crackling like a mad man, this woman will never win a taijutsu match against Itachi, his speed and reflexes are WAY ahead of hers and he has the pre cog of the sharingan to predict her moves, not that he would need it to predict her slow ass moves anyway, you're just being a fanboy yo, noway someone who was outclassed by kabuto in a hand to hand battle can top Itachi, that is a fairy tail.
Damn I can't believe you said something lame enough to make me defend one of the characters dislike the most, but I just had to intervene, you gave me no choice.