Rafa like the deep return position to get a full swing return
get the back knee below the incoming flight path
how you pull back the start of the serve has options — here is a across the crest compact start
on the hit keep your shoulder level
square up the hit point
to loop the start go up on the shoulder rotation
keep the racquet in front and keep the racquët ˙head and hand up
open the front hip by getting the front foot more toward the net
on the overhead use the non hitting arm to guide the ball in
Del Po after the toss is released turns his hand in– this second job keeps the tossing arm up longer
the side of your wrist is pointing towards you –the thumb blocks the right side the other fingers block the left exit
on the hit try and rotate backside through
chase the lob
when your back foot comes in merge your feet
one of the ways to preset the wrist is to place the racquet face to the sky on the motion start