Cycling's governing body has revived the doping case against three-time Tour de France winner Alberto Contador by announcing it would appeal the Spanish federation's decision to acquit him.
The Spaniard tested positive for a tiny amount of the banned muscle-building substance clenbuterol during last July's Tour, which he went on to win.
But he was cleared to compete when the Spanish cycling federation last month rescinded an initial decision to hand down a one-year competition ban.
It accepted the Contador's claim that he had unknowingly eaten drug-contaminated meat and was therefore not negligent.
In the meantime Contador is free to continue racing until and unless the Court of Arbitration for Sport rules against him, the CAS might not be able to deal with the case before this year's Tour de France.