However, it was unclear whether the initial 21-day deadline expired Tuesday, since that window opens only after all the parties receive the verdict and supporting documents, which can be at least a few days or more after the announcement, according to the tennis integrity agency.
“The deadline for filing an appeal to the CAS will be 21 days from the date of receipt of the reasoned decision in question by the appealing party,” the tennis integrity agency rulebook says.
Then WADA has another 21 days to file an appeal to the Court of Arbitration for Sport in Lausanne, Switzerland.
Sinner tested positive twice for an anabolic steroid in March but ultimately was not banned because the ITIA determined he was not to blame. Sinner’s accepted explanation was that the banned performance-enhancer entered his system unintentionally through a massage from his physiotherapist, who used a spray containing the steroid to treat their own cut finger.
Read More: Jannik Sinner’s US Open title run won’t clear the air around him entirely
The doping case was kept secret until last month’s announcement and the top-ranked Sinner went on to beat Taylor Fritz in the US Open final on Sunday.
An appeal could jeopardize his US Open title but Sinner and his legal team have provided detailed evidence that persuaded the ITIA and the tribunal judges that his explanation was credible.