Virtua Tennis 4

Very easy achievement to do.

On main menu choose arcade mode, choose singles since its easier and quicker for this achievement.

You get a medal when you've won so many points with one type of stroke, eg ground stroke, volley etc.

So vary your shots up making sure you get points with three main shot types.

After each arcade level it will come up with a score telling your how many points you scored with each type, the adds acculate as you play through your arcade mode (but not if you start another arcade or quit).

Next to the stroke tallys your medals with appear once you've gotten so many, if i remember correctly just get 3 points with 3 different strokes and it will guarentee you your achievement.