THE ANSWER

After discussing the main biomechanical principles behind the tennis serve, it is apparent that there are a number of factors that influence both the power and accuracy of the stroke. The tennis serve requires athletes to complete a smooth sequential movement pattern involving a number of parts of the body, mentioned earlier. This allows velocity to build up from one body part to the next, resulting in maximum power delivered out through the hand and racquet (Grimshaw et al, 2007). It is essential that the movement sequence is executed with exact precision in order to avoid tissue overload, which may result in injury (Elliot, 2005). 

Along with achieving maximum power, players must ensure the accuracy of their serve. This is achieved by contacting the ball at both the optimal height and angle, mentioned earlier, to ensure a legal serve. The internal shoulder rotation and forearm pronation movement, in both the acceleration and follow-through phases of the serve, also plays a large role in the accuracy of the serve, ensuring that the ball is projected in the right direction (Kovacs & Ellenbecker, 2011). In order to perfect their serve, an elite tennis player will take into account any environmental factors that may influence the effectiveness of their serve, including both weather conditions and court surfaces.