US Open: The spray that caused Jannik Sinner's failed drug tests has 'DOPING' warning A pack of Trofodermin, a medical product meant for treating cuts and scrapes, which contains the anabolic steroid Clostebol, a substance listed in the World Anti-Doping Association's banned substances, is seen on the counter of a pharmacy in Rome, Wednesday, Sept. 4, 2024. (AP Photo/Andrew Dampf)
Jannik Sinner, of Italy, returns against Daniil Medvedev, of Russia, during the quarterfinals of the U.S. Open tennis championships, Wednesday, Sept. 4, 2024, in New York. (AP Photo/Adam Hunger)
A photo of a pack of Trofodermin, a medical product meant for treating cuts and scrapes, which contains the anabolic steroid Clostebol, a substance listed in the World Anti-Doping Association's banned substances, in Rome, Wednesday, Sept. 4, 2024. (AP Photo/Andrew Medichini)
A photo of a pack of Trofodermin, a medical product meant for treating cuts and scrapes, which contains the anabolic steroid Clostebol, a substance listed in the World Anti-Doping Association's banned substances, in Rome, Wednesday, Sept. 4, 2024. (AP Photo/Andrew Medichini)
A photo of the medication guide of Trofodermin, a medical product meant for treating cuts and scrapes, reading among its indications the underlined sentence: "For those taking part in sports: use of the drug without therapeutic needs constitutes doping and can result in positive antidoping tests", in Rome, Wednesday, Sept. 4, 2024. (AP Photo/Andrew Medichini)
Jannik Sinner, of Italy, pumps his fist after winning a point against Daniil Medvedev, of Russia, during the quarterfinals of the U.S. Open tennis championships, Wednesday, Sept. 4, 2024, in New York. (AP Photo/Adam Hunger)
A photo of a pack of Trofodermin, a medical product meant for treating cuts and scrapes, which contains the anabolic steroid Clostebol, a substance listed in the World Anti-Doping Association's banned substances, in Rome, Wednesday, Sept. 4, 2024. (AP Photo/Andrew Medichini)
A photo of the medication guide of Trofodermin, a medical product meant for treating cuts and scrapes, reading among its indications the sentences: "For those taking part in sports: use of the drug without therapeutic needs constitutes doping and can result in positive antidoping tests," and "Clostebol acetate belongs to a group of medicines called steroids.", in Rome, Wednesday, Sept. 4, 2024. (AP Photo/Andrew Medichini)
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A pack of Trofodermin, a medical product meant for treating cuts and scrapes, which contains the anabolic steroid Clostebol, a substance listed in the World Anti-Doping Association's banned substances, is seen on the counter of a pharmacy in Rome, Wednesday, Sept. 4, 2024. (AP Photo/Andrew Dampf)