UEFA hit France's midfielder with six-month doping ban
Nasri, 30, had appealed to UEFA for a therapeutic use exemption (TUE) following a multi-vitamin intravenous booster he received at a Los Angeles clinic in 2016.
That was rejected last March, as was an appeal in December to the Court of Arbitration for Sport.
The method is on the World Anti-doping Agency's prohibited list.
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