There are a number of factors that can increase the risk of injury in tennis players. These include both intrinsic (physical factors) and extrinsic (environmental or external factors). Examples of intrinsic factors include biomechanics, strength, flexibility, and hydration levels. Extrinsic factors include use of inappropriate equipment, footwear, and court surface etc. In designing a comprehensive treatment plan, injury prevention or physical training program for tennis players it is important that all the above factors are taking into account.