Kahn was suspended for 'improper conduct" and also fined 20,000 Swiss francs (12,346 euros) Thursday for his part in a heated argument with doping control officials following Bayern's 2-1 win over Real Madrid in Munich two weeks ago.

The ban keeps the veteran out of his club's Champions League quarterfinal, first leg away to AC Milan on April 3.

"I have never heard of a player being hit with such a heavy penalty for such an offence," said Bayern coach Ottmar Hitzfeld.

Kahn had a heated argument with the doctor supervising the doping controls after he requested that the goalkeeper provide another sample because he had not been present when the first was taken.

Should Kahn's suspension be upheld, reserve Michael Rensing will be in goal for the first leg, before Kahn returns for the home leg at the Allianz Arena.