LAUSANNE, Switzerland (AP) — The Court of Arbitration for Sport says it has received a Russian appeal against the country's doping ban from international track and field.

After nearly three years under sanctions for widespread doping, the Russian track federation is trying to overturn the ban which forces its top athletes to compete as neutrals.

Winning the appeal against the IAAF would return the Russian flag to international championships and scrap a vetting system which keeps competitors out if the IAAF isn't convinced they are clean.

CAS initially said Tuesday it hadn't received the appeal, but now says the case has been filed. It hasn't given a date for the case to be heard.

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