Contador, 28, learned of the decision by the cycling federation RFEC to seek a one-year suspension on Wednesday. He has 10 days to appeal before a final decision is made, according to Spanish newspaper El Pais.
Contador's spokesman and the RFEC could not immediately be reached for comment.
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Contador, who has been provisionally suspended since August, tested positive for the banned anabolic agent clenbuterol during last year's Tour victory. He claimed the result was due to to contaminated meat.