Ajax goalkeeper Andre Onana had his ban for a positive doping test cut to nine months on Thursday and can resume playing in November.
The Court of Arbitration for Sport said its judges found Onana was not at significant fault and reduced his one-year ban by UEFA. The ban now ends on November 3.
The ruling could see Arsenal step up its reported interest in signing the 25-year-old Onana, who is cleared to play for Cameroon at the African Cup of Nations in January.
Ajax goalkeeper Andre Onana has seen his ban for a positive doping ban reduced
Onana tested positive last October for furosemide, a banned diuretic often used as a masking agent to hide the presence of other drugs.