I'm currently a junior at my highschool playing tennis. I want to get better and i'm really close to playing singles, so I want to play year round. The problem is that I have done cross country for the past two years and the team is like a family for me. But training for cross country takes all summer and fall, and I can't play tennis and run because that would absolutely destroy my knees. Additionally, if i do cross country this year I can put it on my transcript and that would look good. What i'm asking is what should I do? Should i quit and work on my tennis game all year? Or run and get worse at tennis during the year? need your opinions.