The COVID-19 outbreak began in December 2019, with the first case reported in the city of Wuhan, China. The number of confirmed patients reached nearly 60 million, and one million four hundred thousand died. Patients infected with COVID-19 may pass the infection asymptomatically or with typical symptoms such as fever, cough and shortness of breath. Gastrointestinal symptoms have been reported: nausea, abdominal pain, diarrhea, smell and taste disturbances. This infection also affects athletes and falls within the scope of sports medicine. Sometimes the asymptomatic course leads to complications from the cardiovascular and respiratory systems, and consequently to deterioration of the condition and sports results. This is especially true of the lower respiratory tract and bilateral pneumonia. In the circulatory system, myocarditis, arrhythmias, heart failure, acute coronary syndrome and death occur. In addition to the diseases mentioned, SARS-CoV-2 can cause hepatitis, sometimes severe, in the nervous system, severe headaches, dizziness, changes in consciousness, smell and taste. In addition, COVID-19 leads to serious complications: bacterial pneumonia, respiratory failure, pericarditis, heart failure, pulmonary embolism, DIC, and deep vein thrombosis. At worst, the infection can cause septic shock and multi-organ failure. Athletes are not at risk of severe SARS-CoV-2, but the infection is common in this group, and athletes who wish to return to training and stress are mostly asymptomatic recoveries. To facilitate safe return, sports and sports medicine organizations have proposed diagnostic workflows. The British Medical Journal Open Sport and Exercise Medicine (BJSM) divided the athletes into groups according to the course of the infection, and further studies were proposed for each of them before training resumed. They include diagnostics in the field of the respiratory system, circulation and an appointment plan. It should be remembered that each case should be considered individually, and the ideal solution is the cooperation of a trainer, sports doctor, pulmonologist and cardiologist. An important aspect is also a gradual return to full activity. The appropriate "team" and the procedure scheme allow to systematize the stages of diagnostics and gradual increase of the training load.