4 Ball

4 Ball is a drill I found on a PTR DVD entitled Effective Feeding Techniques featuring the Director of Sports in the Norwegian Tennis Federation, Oivind Sorvald. It's good for groups of 3 or more. In the video, Oivind had four students. Could be used as a warm-up or as part of the lesson.

Two players play singles straight ahead on one half of the court, focusing on keeping the rally going. Other players are on the other half of the court at the baseline. Coach is across the net feeding balls. These players take turn hitting four balls with Coach, alternating forehands and backhands. Once four balls are hit, next player comes in for their turn. When all players on Coach's side have had their turn hitting the four alternating balls, two of them trade places with the players who have been playing half court singles.

Mr. Sorvald second from left in glasses.
PTR recently partnered with the NorwegianTennis Federation
to provide educational services to coaches. BTW that's my boss
Jorge Andrew next to Mr. Sorvald in the middle.