Visual system is the dominant sensory system and critical for detecting relevant cues in order to effectively produce an appropriate motor response. As such, for successful performance, an athlete, especially in tennis, must identify and attend to relevant visual cues as early as possible
At the highest level of the game of tennis due to the extreme time constraints, the players do not have time to think through the options and generate the potential moves but only one, the right one. The players are restricted to recognize only the relevant action information based on which they should adapt their option generation strategy so they could as fast as possible come up with the adequate reaction.
Contact point is the peak of the acceleration phase. The energy created through the kinetic chain is finally transferred into the distal wrist joint directing the energy of the leg drive, trunk rotation, shoulder internal rotation, forearm pronation and finally the wrist flexion into one special point of time and space