Most players who play tennis love the game. But I think you...

Most players who play tennis love the game. But I think you also have to respect it. You want to do everything you can in your power to do your best. And for me, I know I get insane guilt if I go home at the end of the day and don't feel I've done everything I can. If I know I could have done something better, I have this uneasy feeling.