There are a lot of real pros like this. Lower level pros and super nerds like us care about such things. But actual top level pros? They’re like racing horses. That’s why he always says “we went here and we played such and such matches.” They have whole teams of people to worry about such things as rackets, and specs. The players focus is solely on the match at hand. And frankly some just don’t care about the science of their equipment. Like what’s-her-face that made the news a while back, shes retired, Courier asked her something about her racket and she couldn’t even remember what headsize she used throughout her career. Basic stuff like that.