The Court of Arbitration for Sport today dismissed a Russian appeal against a ban imposed by athletics governing body the IAAF over state-run doping, barring the country's track and field team from the Rio Games.A statement from the Lausanne based court said, the CAS Panel has confirmed the validity of the IAAF's decision to apply Rules which state that athletes whose national federation is suspended by the IAAF are ineligible for competitions held under the IAAF Rules. The International Olympic Committee had said the CAS ruling will help shape its decision on whether to ban Russia entirely from the Rio Games.Russian Sports Minister Vitaly Mutko said he regretted that the Court of Arbitration in Sport rejected a legal challenge by a group of Russian athletes against a ban on them competing in the Rio Olympics. Mutko said Russian officials will consider what steps to take in the light of the court's decision, and that things could not be left as they are.