Sasuke had supassed him by the 3 year jump. He is a natural Sharigan user, mastered Kakashi Lightning Blade beyond what he could do, has more stamina. Oro made it painfully clear that a serious Sasuke could have quite easily wiped the floor with Naruto, 1st clone, Sakura and Sai, so Kakashi fighting. Anything after that period is simply overkill.
Best way to put it is that he is Kakashi 2.0. Most of what Kakashi can do, he can do better. The main things going in the others favour is his MS and experierce, that isn't enough when compared to a guy who has spent much of his life preparing to kill a rank S ninja, and soloed Darara at the near cost of his own life, something Kakashi only did when that same guy was missing an arm, out of ammo and was just stalling for time rather then attempting to kill him. Though on the same token at least was aware of the value of backup, something Sasuke is seemingly oblivous of and had almost cost him his life at least 6/7 times in the series.