Want to switch to this to save my elbow. Want to come around more like a cricket player than a baseball pitcher. Wish I could find better info on injury susceptibility and various grips for all the strokes.
like this footage there are several instructional videos about this matter, but more important is the tennis coach opinion or view about your serve motion (who actually can see it), and ground strokes, etc... so, you should ask for professional advice. and a fitness trainer may help also. Good luck!
Subtle differences in every stage, but the easiest to see might be where he hits the ball in relation to his head. In the first serve the ball is almost straight above his head when he strikes it, in the second its way behind him (to the right of him from this view).
watch the first serve where the racquet face meets the ball directly (flatter serve), and then on the second serve the racquet face brushes it at an angle more, instead of meeting it head on. There is a trade off, if you want more speed you have more direct contact, if you want more spin you have less direct contact and more "cutting" of the ball
