Last year, Errani, who was once ranked fourth in the world, tested positive for the banned drug letrozole, a substance used by her mother for the treatment of breast cancer.
“The TAS in Lausanne has reconfirmed, once again, it has been an inadvertent ingestion, and moreover, of a substance that is not enhancing performance.
“I have already served seven months. Between results disqualification and period of inactivity, I have been forced to re-start with a ranking position of 280, and I climbed back. And now they want to add an extra sanction of eight months. All of this is total nonsense!”
The decision follows Errani’s appeal against the original ban and voided results, while the Italian anti-doping agency had asked for a longer suspension.
Errani, who has won five grand slam doubles titles, is unsure whether she has a future in tennis.
“I don’t know if I will be able to find the strength and the desire to play tennis again after all of this,” she wrote.
Last week, Errani withdrew from the Croatia Bol Open after reaching the semi-final stage.