Former Italy striker Giuseppe Rossi faces a hearing next week with the country's national anti-doping organisation after testing positive for a banned substance.
The 31-year-old's name appeared on a list of upcoming cases published on the NADO Italia website on Tuesday, with his hearing scheduled for 1 October.
He denied any wrongdoing, telling Italian news agency ANSA: "I have always been clean, this is a clear case to be shelved: the positive test is due to an involuntary food contamination."
Rossi is currently a free agent and most recently played last season for Genoa, whose coach Giuseppe Ballardini defended his former player.
In a news conference broadcast on the club's website, Ballardini said: "I'm not certain of many things in life.
"One certainty I have though is that Rossi did not use banned substances - it is beyond any reasonable doubt."
Reports in Italy claim Rossi tested positive after Genoa's game against Benevento in May for dorzolamide, which is usually found in anti-glaucoma medication but can be used as a masking agent. It was also reported that Rossi did not have the necessary therapeutic use exemption for the medication and could face a one-year ban if found guilty.
Rossi began his professional career in England with Manchester United and spent spells on loan at Newcastle and Parma.
He has also played for Villarreal and Fiorentina, spending loan spells at Levante and Celta Vigo, and won 30 caps for his country in a career hampered by injuries.