Tennis: Backhand Slice with Bite !!

Note how the racket swing plane flattens initially by tucking the left elbow ...this is the first move down and happens before the left arm swings out behind you in the follow thru

...As the arm drops, rotate the core thru impact to get good side brush and forward drive

Get side-ways on to incoming ball, prep racket putting "9 o'clock" on collar bone...pull down and then across ball with slightly open face at impact..weight moves fwd ...follow thru: racket face points diag. skyward...stay side on thru shot ...left arm goes back and behind torso for balance...KEY: Dig the strings into the ball aggressively

Tip of cap to Kevin Garlington at Total Tennis Domination for his YT video

weight stays fwd and the pivot point is the right shoulder