Sinner, the reigning Australian Open champion, tested positive for traces of the steroid clostebol in March on two occasions.
The International Tennis Integrity Agency cleared him, accepting his account that the substance entered his system through a spray used by his physiotherapist to treat a cut, followed by massage and sports therapy.
The World Anti-Doping Agency (WADA) has appealed to the Court of Arbitration for Sport, and Sinner is now awaiting a potential suspension.
When asked the day before the Australian Open if he had any information on the timing of the verdict, the 23-year-old replied, “I know exactly as much as you guys know.
“We are in a stage where we don’t know many, many things.”
Sinner, who faces a stern first-round test at Melbourne Park against big-hitting Chilean Nicolas Jarry, admitted the scandal continued to play on his mind.
“You think about this, of course,” he said. “I would lie if I would tell you I forget.
“It’s something what I have with me now already for quite a long time. But it is what it is. I’m here trying to prepare the Grand Slam. Let’s see how it goes.”
Sinner said he had always been “very, very careful on every single medicine I take, even what I eat”.
“When the bottle is open, I throw it away, I take a new one,” he said.
“In my mind I know exactly what happened, and that’s how I block it (out).
“I haven’t done anything wrong, that’s why I’m still here. That’s why I’m still playing.”
‘Misinformation’
Last week, Mr. Novak Djokovic advocated for increased transparency regarding doping suspensions within the sport of tennis, asserting that elite players receive preferential treatment compared to their counterparts.
Mr. Gaudenzi refuted this claim in an interview with the Australian Associated Press on Friday, stating that Mr. Sinner's case was handled appropriately.
“I genuinely believe there has been a lot of misinformation out there, which is unfortunate,” Gaudenzi said.
“I am 100 percent sure that there has not been any preferential treatment. The process has been run by the book and according to the rules, by the ITIA.”
While Djokovic said he believed Sinner when he said he tested positive due to contamination, the 24-time Grand Slam winner asserted that players had been “kept in the dark” throughout the process.
But Gaudenzi said he only found out about the case “two days before the announcement from the ITIA — the way it should have been”.
“I initially was a bit shocked. (But) it is completely independent and they obviously went to an independent panel.”
Gaudenzi pleaded for patience so the saga could play out, while declaring that the sport would survive should Sinner be banned.
“If that is the case, I think he’ll survive and I think we’ll survive. Overall, tennis is a very strong product,” he said.