On Friday, UEFA banned Ajax goalkeeper Andre Onana for 12 months after failing a doping test in October 2020.
The ban will take effect from February 5, 2021 and will apply to all football activities at national and international level.
Furosemide was found in Onana’s urine in an out-of-competition review, but Ajax claims the Cameroonian international took it “accidentally” after feeling unwell.
“On the morning of October 30th, Onana was not feeling well. He wanted to take a pill. However, he inadvertently took Lasimac, a drug that his wife had previously been prescribed, ”Ajax said in a statement.
“Onana made a mistake with the product and mistakenly took his wife’s medicine, which ultimately led UEFA to crackdown on the goalkeeper.”
In response, Ajax managing director Edwin van der Sar said: “This is a terrible setback for Andre himself, but certainly also for us as a club. Andre is a top goalkeeper who has proven himself for years for Ajax and is very popular with the fans.
“We were hoping for a conditional suspension or a suspension that was much shorter than those 12 months because it was probably not intended to strengthen his body and thereby improve his performance.”
Onana and Ajax will appeal the judgment to the Court of Arbitration for Sport (CAS).
The 24-year-old joined Ajax from Barcelona in 2016 and was heavily linked with a move to the Premier League last summer.
Onana has made over 150 appearances for Ajax and his current contract with the Dutch giants expires in 2022