sorry, who is "a-train"*?
i see your point, though I would have though working out your legs and doing movement exercises would be more important. Isn't there a risk that focusing on the bench press might make a tennis player unbalanced? That his back and rotator cuff muscles aren't as strong.
* I'm not trying to be smart, I don't know all the nicknames.
Disclaimer: I'm NOT a coach...
Real tennis: https://www.youtube.com/watch?v=yDqnkLJ9BtM