Jannik Sinner to play US Open semifinal after failed drug tests due to steroid spray with big 'DOPING' warning

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Despite two failed doping tests this summer, Italian tennis player Jannik Sinner is on his way to the semifinals at the U.S. Open. 

Sinner will play England's Jack Draper Friday night for a chance to play in the men's singles final. The 23-year-old star is looking for his second Grand Slam title amid ongoing backlash against his eligibility for this year's tournament by the International Tennis Integrity Agency (ITIA). 

Sinner tested positive twice for a banned anabolic steroid in March. The anabolic steroid he tested for is called clostebol and is a derivative of natural testosterone. 

The source of the clostebol was a spray used for treating open wounds that is available without a prescription. However, the packaging of that spray has a large warning that says "DOPING." 

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The spray, Trofodermin, also contains an underlined warning in Italian on the medication guide that comes inside the box that says, "For those taking part in sports: use of the drug without therapeutic needs constitutes doping and can result in positive anti-doping tests."

Clostebol is listed in the anabolic androgenic steroids section on page 5 of WADA’s 24-page list of banned substances. Italian law dictates that all medications that include substances on the World Anti-Doping Association’s (WADA) banned list come with the printed "DOPING" warning.

Jannik Sinner returns a shot during the first round of the U.S. Open Aug. 27, 2024, in New York.  (AP Photo/Kirsty Wigglesworth)

San Diego Padres star Fernando Tatis Jr. was suspended by MLB for 80 games after testing positive for the same drug in 2022.

Sinner was not