i think players need to speak their minds more. especially when it comes to things like rules, MTO abuse, pay and such. these issues are critical to the sport and are worth discussing but you'll never hear about them in public... the sponsors, tourny directors and national bureaucrats don't want the fuss.
Disclaimer: I'm NOT a coach...
Real tennis: https://www.youtube.com/watch?v=yDqnkLJ9BtM