WHY CHOOSE A TENNIS-SPECIFIC SKIRT?
The most important role a tennis skirt has to play is carrying balls.
There are 2 pockets built into the undershorts (1 on the left and 1 on the right) so that you can quickly move on to your second serve or start a new rally.
For players who like tucking their ball into their undershorts: the fabric was specially chosen to hold the ball in place, even during intense play.