keep the racquet in front of you setting the racquet at a 60 degree angle hitting the outside of the ball
get the back knee below the incoming ball
when you step up you need to track the ball in
when pulled in wide best response is to go down the line
if you can get back to absorb the incoming power
on the serve hit go up and out
get core balanced on your preparation and stay that way through the hit
use your body and rotate into the hit
lean into the toss
on the serve one choice is to drop down on the start
on the follow through drive up and out
Sinner did get a knockdown of Monfils
going low to high and finish on the hit side
on the two handed backhand finish get both elbows up
on the jam serve pull the front leg away from the ball