Big Ant please make the game as hard as possible at Expert difficulty

Dear developers, I am begging you to make the Expert difficulty as realistic and as difficult as possible.

I completely stopped playing AO Tennis 2, even though I loved it, because the game was too easy.

I was easily beating 88, 86 and 85 rated players with no challenge at all. They could rarely even win a game against me.

Please make the game HARD on Expert difficulty, but not too hard where it is impossible to win, just make it balanced.

Or at least let us have our own sliders where we can tweak things like AI unforced error rate, AI shot power etc.

I want to be really challenged this time and not like AO Tennis 2.