Players form two lines behind the baseline; the coach (F) is on the opposite side having a basket to feed balls from (see graphic below).

Drill:
The first player from each line (two at a time) moves up toward the net while hitting the following:
1. Short ball approach (coach uses double-feed to bring both players up in the same time)
2. Volley
3. Players move up to the net, tap it with their racquets then back up to hit a series of four (4) overheads; after each overhead players move up to tap the net.
As soon as both players hit the last overhead shot, they exit and jog around the court (or perform various exercises: ladder drills, etc) before going back in line.