( CNN ) -- Alberto Contador has criticized the two-year suspension he received for doping -- and has vowed to return to cycling in August even stronger than before . On Monday , the Court of Arbitration for Sport ( CAS ) found Contador guilty of taking banned substance clenbuterol , although they also ruled that the Spaniard did not ingest it intentionally and was likely a victim of a contaminated food supplement . But the 29-year-old , who addressed a packed press conference at a hotel in his home town of Pinto , just south of Madrid , said he was disgusted with the outcome and protested his innocence . `` I am going to continue cycling , '' said Contador . `` I am going to continue practicing it cleanly , the way I have my entire life . `` My mood right now is not the best but I know this will make me stronger in the future , '' added Contador , who blamed contaminated steak for his positive test . He continued : `` Anyone who reads the decision will clearly see that I did not take drugs . The hardest thing has been to see the suffering my family has been through . '' Contador 's positive test related to the 2010 Tour de France , which he won by just 39 seconds ahead of Luxembourg 's Andy Schleck . It was made public by Contador himself in August 2010 , with the two-year ban backdated to that announcement , meaning he can resume racing in seven months . However , Contador has been stripped of all his victories from that period , with Schleck now awarded the 2010 Tour de France title and Italian Michele Scarponi named the winner of the 2011 Giro d'Italia . He will miss this year 's Giro , Tour and Olympic Games . However , he will be eligible for the 2012 Tour of Spain , a race he won in 2008 , and for the world championships in Limburg , Netherlands . Contador would not elaborate on his future racing plans , saying : `` I still do n't know what my program will be after my suspension . `` I have to organize my future but that does not depend only on me . What I know for sure is that I want to continue to win the biggest races in the world . ''
Alberto Alonso has vowed to come back stronger after his two - year long suspension . Contador is banned until June 2012 after being found guilty of taking illegal clenbuterol . Court of Arbitration for Sport suspended him despite claiming he did not dope .