Sports do not have to be competitive. Help her to build her skills and confidence before she is put in a position of anxiety. By being on this team, she can gain a great sense of camaraderie, as well as communication skills and assertiveness. You can help her to learn some relaxation skills before a competition. It can be very scary out on the court.
Anxiety can be overwhelming, and a big distraction.
Psychological Skills for Marathon Running . Also, find out if there is a difference in her anxiety level when you are at the game watching and when you are not there. Sometimes, pleasing mom and dad causes the most pressure. It sounds like you really care and have a good handle on her feelings. Try to avoid asking her about points, winning and scores.