Mini Green Tennis is for players coming out of Orange Ball, and heading toward full tennis. The court is full size, with the only difference being that the balls used are slightly lighter.
This helps players technique remain sound as they get used to playing on a larger area.
Green ball tennis is often for juniors aged 10/11 years old, but is also great for older beginners, or older adult players who are more comfortable with a slower ball. More info on Mini Green Tennis can be found at - http://www.lta.org.uk/LTA-Mini-Tennis/Green/Mini-Tennis-Green/