|These bad boys will put a hurt on you|
Four players on court at service line. Someone feeds a ball and point is played out. Players may not back up - point must be played out at or in front of service line. Points awarded as usual. Set a certain number of points to be achieved, then rotate positions or players.
Play should be fast-paced. Insist on good footwork and recovery.
From The Tennis Drill Book by Tina Hoskins.