Minefield

You will need some throw down spots or lines for this activity. Works for any level of player. It is a simple concept with unlimited variations. Especially good for improving targeting/direction.

Place three small targets on each side of the net. Players play singles with regular scoring. If either player hits any target during the point, that player wins the point.

Variations
Experiment with the size/shape of the court - play only the service boxes, or only deuce side, or only back court.
Modify the scoring to speed things up - first to X number of points wins, rather than traditional 15-30-40 scoring. Or, how about combining Minefield with Black Jack??
Move targets to service boxes only and make freebie points only available on serve.

Adapted from The Tennis Drill Book by Tina Hoskins