Wow... Now, I’m not a tennis player, nor did I grow up being one. But this struck me as very obvious as to how the precision needed to perform this exercise can benefit players in racket sports (hockey, lacrosse, field hockey, baseball, etc...)
Here are the details from the original post...
“Fun exercise in concentration with @functionaltennis ' tennis pointer. The precision demanded by this tool makes play with a regular racquet facile. Look forward to sharing this tool with players soon⚡🎾”
Video credits to @tennisrecon #handeyecoaches