Service and return are extremely important, if I may say the most important shots in tennis. The service is the only ball in tennis that is always hit from the same starting position. It is the only ball with which you can make a direct point without the opponent being able to do anything. Therefore, practicing precision and speed on the serve is essential. But also the return is important to practice. You have to practice this shot from different situations on fast and slow serves to be able to get out of pressure situations or to put the opponent under pressure. Have fun practicing!