....................................................
The wisdom in the point being made by the OP, is that one should look up at the point of release of the toss. This should start the serve routine.
That is probably a good start but the head in a high level serve moves forward quite a bit and there are other issues. And the eyes are most often not on the ball at impact for the high level serve. So I disagree with "Then to keep the head up at impact....." based on my viewing many high speed videos from the side. Some high level servers might look at the ball but most don't. It might well be better for recreation level servers to look at the ball at impact. We are talking millisecond timing here for the high level servers. See Tsonga videos for head movement.
Keep in mind that Tsonga is the rarer pro server who might keep his eye on the ball until impact. Milliseconds later he is looking down as the videos show.
Most of the side view video impact don't show pro players looking up at the ball. Typical side view at impact -
I have not looked at the lady pros on this issue.
Servers should understand these issues if their objective is to copy a high level serve.
1) the head moves forward quite a bit in the serve between the toss and impact. See the Toly Frank Salazar overhead composite pictures from FYB videos that are the best thing on the internet to display this.
2) the ball moves forward in the toss to an unknown degree that probably varies for servers and serve types.
3) for most high level servers the head usually tilts downward very rapidly to the degree that it usually prevents keeping the eye on the ball at impact. Tsonga is one of those servers who may keep their eye on the ball until impact. But look at the rapidity of his head movement in reply #14 . This is probably done to relieve stress on the neck.
There are Salazar spin serves pictures, copied from FYB videos.
The balls tosses are completely different.
1. Kick serve – contact point is above Salazar’s head.
2. Slice serve – contact point is above Salazar’s shoulder.
There are no identical tosses in pro tennis for different spin serves. :shock:
BTW, Look at Salazar's head position at impact. His brow blocks looking at impact.