Multiskills Early Years & Inclusive Zsig Mini Tennis Red Stage MP8 Tough Guy 8cm Ball Bag of 5 Dozen (60 Multisport Classic Family Set with 3m Net Zsig Mini Tennis Balls Zsig. Durable 8cm cut foam ball LTA Red Stage. ITF Play and Stay Stage 3 Advance Mini Tennis balls are designed for older Mini Tennis players whose requirements have moved on from those of the younger age range and are looking for a speedier, more challenging game. The ball is slightly heavier, and a little faster, with a higher bounce than the Matchplay 8. We recommend it for upper Primary School and Secondary School use, and it's a popular choice for adult groups looking for faster play on a Mini Tennis court.