WADA, the World Anti-doping Agency, has confirmed that it is to appeal the decision of the Spanish national cycling federation, the RFEC, to exonerate Tour de France champion Alberto Contador following his positive test for clenbuterol during last year’s race.

The appeal to the Court of Arbitration for Sport will be conducted as a separate process to that announced last week by world cycling’s governing body, the UCI, that it would appeal the decision, although it is likely that the two organisations will share resources in putting their cases together.

In a statement, WADA said that in line with its policy, it would “refrain from commenting further in order to protect the integrity of the process.”

Meanwhile it has emerged that contrary to a report in French newspaper L’Equipe last week, the possible presence of plasticizers that could provide evidence of an illegal blood transfusion will not form part of the UCI’s argument in its own appeal.