pro's left foot landed a foot inside baseline after serve

Nortice captioned.

Then noticed players at my club serving with their left foot planted on court even after contact.

Does anyone know is it the secret of more power in serve because of a stronger upper body rotation and moving forward during serve ?

[Steve H.]

yup --

notice also where the pro tosses the ball -- well inside the court for the same reason

[kevhen]

Plus there are better hitting angles when jumping up and into the court. I land about 2 feet inside the court with both feet. My right foot swings in early though and I am told I could get more twisting power if I kept both feet planted until ready to explode on the serve. My toss would land a foot inside the service line I think.