Originally Posted by dominikk1985
the "across" is a function of body rotation and pronation. you are not trying to swing across (in fact you try to swing as much in line with the ball exit path as possible. but since the swing is rotational you will not be able to hold that line for more than a fraction and then it goes "across".
for a CC shot you really hit "across" but only compared to the side line not ball flight.
the across is just a combination of the upward brushing and rotation (of spine and arm) it's nothing you should do intentionally.
And this is where we differ a bit. I respect the above opinion to see it that way,
but when I do the across part, I do intend to do it for a couple of important
reasons. Imo when you try not to follow the natural rotational arc, and seek to
extend further straight out, you tend to
get a push behind the ball that works against you.
also when you work across the ball with the natural arc, the swing is smoother
and you can control net clearnce better in my experience.