After being wrongly suspended for a failed drug test in 2016, a former Liverpool defender is now suing the World Anti-Doping Agency (Wada) for £13 million (R226 million) in damages.
Click through the gallery above to see some other players who failed drug tests during their careers.
Three years after being cleared of any wrongdoing, a former Liverpool and France star is now taking the World Anti-Doping Agency to court after the doping authority's incorrect finding effectively sent his career spiralling.
According to the Daily Mail, Mamadou Sakho is suing Wada for £13 million in damages after a wrongful suspension for using a banned substance negatively impacted on his club and international career.
The Frenchman was suspended for 30 days in April 2016 after testing positive for using a fat-burning substance, but was later cleared by Uefa, who found "significant doubt" that the substance was in fact banned by Wada.
The ban resulted in Sakho missing Liverpool's 2015/16 Uefa Europa League final against Sevilla, which the Reds lost, and ultimately cost him a spot in France's squad for the 2016 Uefa European Championship.
Liverpool sold the Frenchman to Crystal Palace the following season, and the player's legal representatives argue that the wrongful ban directly resulted in the end of his stay at Anfield and cost him millions.
This is disputed by Wada, who claim Sakho's Liverpool departure was not related to the failed drug test, but rather to a personality clash with manager Jurgen Klopp.
"The loan and transfer to Crystal Palace in January 2017, and the non-selection for France, are events following the disciplinary proceedings and are not causally related to the claimed act of Wada," Wada's legal counsel stated.
Sakho believes Wada was negligent in its handling of his case and is also suing for defamation after the doping authority maintained its findings in e-mail correspondence to various journalists between 2016 and 2017.
Sakho joined Liverpool from Paris Saint-Germain in 2013, and scored three goals in 80 appearances during his time with the club.
Do you think Wada is responsible for Sakho's Liverpool departure, or should the player take some of the blame? Share your thoughts by commenting below.