ABSTRACT: Modern tennis sport is characterized by constant change in several directions. The most significant of these changes are connected to the design of tennis rackets. The composite material of the rocket’s frame is continuously improved. It is also working hard on improving the tennis strings. Tennis balls are also being modified. All these innovations lead to a change in the shot technique of the athletes. Modern tennis players use a variety of strokes. From the physical point of view, these blows can be classified into eight main groups depending on the way the racket interacts with the tennis ball. These are the strokes with top, bottom, side, top-side, and bottom-side rotation, as well as strokes without rotation. These eight interactions lead to main types of trajectories at the same initial position and the same initial linear velocity. The main purpose of the work is to study the two most important strokes in professional tennis: forehand with upper rotation and backhand with lower rotation. The calculations and graphical images are performed with the MatLab mathematical package. The conclusions are important not only for specialists in the field of Theoretical and Applied Mechanics, but they would also be useful for sports specialists, coaches, and tennis players.
