Even though this following exerpt was from a spin-off, it's written by the same author as canon and gives insight on how an SAO player thinks in battle. Obviously this event is non-canon, but there's stuff in here that is canon, such as Kirito's battle experience. Here's the exerpt:
It was at an amazing speed.
The silvery white avatar «Silver Crow»’s rush with his middle right kick slipped past my abdomen, its movement was ultra smooth as if it had been repeatedly practiced thousands of times.
However, due to its smoothness, I could feel where the first attack was aimed at.
The one moving Silver Crow was a living human, there’s no mistake about it. Then, when the human operates the avatar, there will be the tiny bits of information exposed from its movement which didn’t exist in monsters. The significant ones are heart beats, toe direction, waist height, and gaze.
For a duel in SAO, it would be fatal to get hit by a single strike, so it was very important to read the opponent’s movement in advance. Therefore when needing to fight with an evenly skilled person, any move fired from a long distance must be avoided at almost a hundred percent rate. Jumping moves need to be blocked, as evading might leave an opening, and a favorite special move is sure to be inserted in between the flow of continuous attacks that followed.
From that perspective, the Silver Crow’s middle kick speed was, without a doubt, marvelous. But its movements gave out too much information at the initial moments, I could feel the intention to hit my left flank, so I dashed backwards with all my strength.
In summary, Kirito's used to fighting enemies that use hand to hand combat, and even the slightest movement will make Kirito realize the intentions of his opponent.