Hamburg - German cyclist Stefan Schumacher has lodged an appeal against a doping ban at the Court of Arbitration for Sports (CAS).

The CAS confirmed on Wednesday it received the according letter from Schumacher's lawyer Michael Lehner. A date for a hearing is yet to be announced.

Schumacher won two time trials at the 2008 Tour de France and wore the overall leader's yellow jersey for two days at the famed race before retests of his Tour samples in autumn revealed that he had used the latest generation of the blood booster EPO, known as CERA.

He was banned by the ruling body UCI for two years from January 21, 2009, onwards, after an initial ban was spoken out by the French anti-doping authorities.

Schumacher has protested his innocence and named the ruling a scandal.  (dpa)