Hey Steve, yes so often the key difference in spin is all in the quality of the contact, which does come a lot from the wrist. Of course there are some other things which help to that you mentioned like acceleration and also the body rotation which he does very well. Also all the Pro player shave of course spent many many house working on their serves and it’s like anything, the more time you work on it and improve it, the stringer and more natural it becomes and the easier you can generate spin.
I also feel quite often the spin level between myself and Dan’s serves and a Pro serving isn’t a huge difference but it can come down to a few parts like the variety, keeping it tight to the net and low and the speed of the serves as well. But serving is super important and a good area of the game to work on as you can win points directly by improving it! 🙂
