ITIA chief Moorhouse also rejected claims that women’s world No 2 Iga Swiatek was given a lenient punishment after her failed drug test last year.
“It’s the same rules and the same processes for every player,” said ITIA chief Moorhouse, speaking to Tennis365 in an exclusive interview.
“All cases are different and each case turns on individual facts. Cases can also be quite complex, so it isn’t right to look at two headlines and draw comparisons between two cases as the detail is always the key part.
“If you test positive for a banned substance, your starting point for a possible sanction is four years. If you can demonstrate that it was not intentional, that reduces to two years. Then, if you can prove there was no fault, there is no sanction.
“In addition, a decision of ‘no significant fault or negligence’ could fall between a reprimand and two years. That applies to any cases around a contaminated substance.
“It’s the same rules and the same processes for every player. All cases are different and each case turns on individual facts.
“Cases can also be quite complex, so it isn’t right to look at two headlines and draw comparisons as the detail is always the key part.”
Sinner will have plenty of questions coming his way on his doping suspension when he returns to action, with this story certain to be a stain on his record for the rest of his career.
For now, Sinner’s focus is on his comeback and his latest practice session in Beaulieu-sur-Mer, with his friend and rival Jack Draper his hitting partner.
Draper confirmed he is a big threat at the top of the men’s game when he took advantage of Sinner’s absence to lift the Indian Wells title last month and now these two are set to renew their rivalry when Sinner returns to action in Rome next month.