Some individuals come to the tennis court wearing jut about anything. Well, I guess that's okay. But, when I see someone that has invested the time to choose the right tennis shorts, I know that that person is pretty much serius about the sport.
I sometimes see players with jeans trying to play amd they get angry when they can't get to the ball. Well, not only is this restricting them, it also does not allow them to bend their knees, which is a basic fundmental of playing the game.