it's great to see players as commentators. i know it could be less hollywood and entertaining for some casual observers at times, and that their style isn't as polished as the corporate broadcaster types, but they do give you more context, insight, and a different perspective on the players, competition, strategy, technique and even equipment.
they'll even say stuff that you can disagree with and they usually have actual opinions. ultimately, they're generally fans of the game and it shows.
Disclaimer: I'm NOT a coach...
Real tennis: https://www.youtube.com/watch?v=yDqnkLJ9BtM