It is expected that the increase in knowledge about the injury process and injury prevention will reduce the number of injuries, but unfortunately, number of injuries is in slight increase. The reason for this is an increase of number and intensity of training and more frequent competitions. Anterior cruciate ligament injuries may vary from lesion to complete rupture. The aim of this paper is to present the rehabilitation of the patient, in this case a professional football player, after anterior cruciate ligament reconstruction caused by a ligament rupture. The case is based on the implementation of physiotherapy exercises and their effect on an entire treatment. After injury, preoperative measurement shows reduced range of movement of right knee joint, reduced volume of right lower limb’s muscles, the presence of pain and reduced safety while relying on the limb. The measurement results at the end of physiotherapy rehabilitation process manifested in the form of an increase in muscle tone and range of movement in knee joint, and the improvement in proprioception, reduced fear and insecurity while relying on the affected limb and reduced pain. Based on this results and rehabilitation, it can be concluded that the implemented physiotherapy exercises improved the overall condition of the right knee joint after injury and anterior cruciate ligament reconstruction.