Won't turn down the grunts without turning down the crowd
What's annoying is that you only get two sound sources to mix - the court and the commentary.
To get this useful, you really want to be able to still hear the crowd noise, and hear the ball striking the racquet, but just miss out the screeches (particularly of certain players, like Azarenka).
I guess that the only way to do that would be to mic the player directly (a headset or something) and then subtract that from the rest of the noise.