One of nine people are left-handed. Baseball pitchers and tennis players seem to have an advantage, if left-handed. In tennis the “hook ” serve from a southpaw spins wide to the backhand return of right handers. Lefty Nadal added ” the stinger ” as a second tool to pressure the same effect. ( see link to THE CIRCLE STINGER–https://littlegreenbookoftennis.com/2020/02/28/tennis-tactics-the-circle-stinger-65/
The return to counter the hook and the stinger was the “down the line return “. AI (ChatGPT)
( The next link–https://chatgpt.com/c/6894c0a6-cc94-8327-a93f-c63a68bc3c6b) compares records of FEDERER, NADAL, AND DJOKOVIC ! Pretty close !!!
The Joker seemed better than Rodger at the DTL return.
Last night Ben Shelton and Karen Khachanov upset Fritz and Zerev. Tonite the classic battle looms : Ben has the lefty hook. Khachanov has a great two handed backhand.
Let the games begin!
The Little Green Book of Tennis 
I noted 11 obvious hooks. Nine of 11 –point to Ben. However, one backhand return gave Khackanov the break and the first set.