Mini Tennis Red A (4 - 8 years). This group is for children who are approaching the level where they can compete in county tournaments. They can have short groundshot rallie & serve from the baseline. Mini Tennis Red is played either on a badminton sized court (usually indoors) or a modified outdoor tennis court. Short rackets (17” – 23”) are used along with sponge or low compression red balls. The tie-break scoring system to 7 or 10 points is used.