This drill can add 10 MPH to your serve

[@gregoryphillips3969]

The person serving looked like John Mcenroe with the twisting and being left handed.
Hold the coil as long as possible so everything comes through at once. Good video.

[@kiesbett]

good serve

[@CH-yp5by]

That exaggerated twist serve exercise reminds me of Jimmy Connors

[@rcyc]

or McEnroe & Becker