Originally Posted by toly
Let's look at the next photos of Stosur kick serves...
Figure 10. Sam Stosur Kick Serve
Unfortunately every picture produces an illusion. Nevertheless, it seems that the ball falls after contact even in case of kick serve. IMO there is no way it rises in case of twist serve
I noticed that you ignored the original link that I provided that showed a rising ball on a kick serve. I know with absolute certainty that nearly every kick serve that I have hit for the past 20+ years has risen after contact. Many
other serves that I have faced (4.0 to 5.5 level players) have a kick or twist serve that rises noticeably
after contact. With a small % of these servers, it is not apparent if the ball rises or not.
Even Rod Cross talks about kick serves that rise (the "lob" kick serve he mentions is an example of this).