Giuseppe Rossi risks a one-year doping ban, after testing positive for dorzolamide after Benevento-Genoa last season.
The Italian international is currently without a club after leaving the Grifone, making nine appearances and scoring once.
Rossi tested positive for dorzolamyde, a drug that can usually be found in anti-glaucoma medication, but which is a carbonic anhydrase inhibitor and can be used as a masking agent.
A masking agent works by making drug tests ineffective, leading to false negative results.
The striker has been questioned twice, according to Gazzetta dello Sport, and he's denied using eye drops or doping, with Nado Italia requesting a year’s suspension.
Rossi is not currently suspended, and will face trial on October 1 at 14.00 Italian time.