Practice at any-time: Rope tennis does not need tennis partners.You can practice tennis at any-time,regardless of the weather,indoor or outdoor,so-that you can get rid of the restrictions of opponents and the space,and practice at any-time. Multi-purpose trainer: tennis ball is faster than playing with people,so it is very suitable for individual practice,especially to improve tennis-player' flexibility,and precise control of. Application scenario: The tennis training ball is very to carry.This tennis training tool is suitable for tennis,garages,basements,fitness rooms or other open space. Single-player training: This is a multi-purpose tennis training ball,which is very suitable for single-player to practice all tennis skills.It is an excellent teaching tool for beginners and intermediate tennis-player. With elastic rope: the tennis ball is equipped with a long rubber rope,which makes it easy for the tennis ball to in a single training,just like someone is playing with you.There is need to pick-up the ball frequently.