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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)

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, kisses the championship trophy after defeating Taylor Fritz, of the United States, in the men's singles final of the U.S. Open tennis championships, Sunday, Sept. 8, 2024, in New York. (AP Photo/Seth Wenig)

Jannik Sinner, of Italy, kisses the championship trophy after defeating Taylor Fritz, of the United States, in the men's singles final of the U.S. Open tennis championships, Sunday, Sept. 8, 2024, in New York. (AP Photo/Seth Wenig)

Jannik Sinner, of Italy, holds the championship trophy after defeating Taylor Fritz, of the United States, in the men's singles final of the U.S. Open tennis championships, Sunday, Sept. 8, 2024, in New York. (AP Photo/Kirsty Wigglesworth)

Jannik Sinner, of Italy, holds the championship trophy after defeating Taylor Fritz, of the United States, in the men's singles final of the U.S. Open tennis championships, Sunday, Sept. 8, 2024, in New York. (AP Photo/Kirsty Wigglesworth)

Jannik Sinner, of Italy, and Taylor Fritz, of the United States, listen to comments during the trophy ceremony after Sinner defeated Fritz in the men's singles final of the U.S. Open tennis championships, Sunday, Sept. 8, 2024, in New York. (AP Photo/Julia Nikhinson)

Jannik Sinner, of Italy, and Taylor Fritz, of the United States, listen to comments during the trophy ceremony after Sinner defeated Fritz in the men's singles final of the U.S. Open tennis championships, Sunday, Sept. 8, 2024, in New York. (AP Photo/Julia Nikhinson)

Jannik Sinner, of Italy, reacts after defeating Taylor Fritz, of the United States, to win the men's singles final of the U.S. Open tennis championships, Sunday, Sept. 8, 2024, in New York. (AP Photo/Julia Nikhinson)

Jannik Sinner, of Italy, reacts after defeating Taylor Fritz, of the United States, to win the men's singles final of the U.S. Open tennis championships, Sunday, Sept. 8, 2024, in New York. (AP Photo/Julia Nikhinson)

Jannik Sinner, of Italy, reacts after defeating Taylor Fritz, of the United States, to win the men's singles final of the U.S. Open tennis championships, Sunday, Sept. 8, 2024, in New York. (AP Photo/Kirsty Wigglesworth)

Jannik Sinner, of Italy, reacts after defeating Taylor Fritz, of the United States, to win the men's singles final of the U.S. Open tennis championships, Sunday, Sept. 8, 2024, in New York. (AP Photo/Kirsty Wigglesworth)