Pops Mensah Bonsu, who was tested positive for doping, claims that he has never used banned substances.
The 31-year-old Brit explained at a press conference that he suffers from attention deficit disorder, which is why he has to take a specific drug.
"This drug does not improve my performance, it just helps me find balance and concentrate like a normal person", AEK centre said. "I have never used a banned substance and it is unfortunate that this drug has not been approved in Europe. I have never taken it before a match, even though I need to take it every 12 hours".