Originally Posted by toly
To clarify the matter, there is one more example - Ryan Chung hits unreturned twits serve around 8:13
I extracted four frames from this video.
Figure 4. Ryan Chung's twist serve
Chung tosses the ball very far to the right. During contact the racquet is slightly closed and he hits the ball above its equator. This is really very complicated serve.
The follow thru at 8:12:56 and contact point at 8:12:66 ... that's why I never could make my twist serve work
This post is provided with my best (and ever limited) knowledge of English, make your best effort to understand what I am saying.