The Court of Arbitration for Sport overturns the ban on Russia by ice hockey's global governing body. The Court of Arbitration for Sport (CAS) on Fridayoverturned the International Ice Hockey Federation’s (IIHF) decision to exclude Russian national teams from upcoming world championships, marking. Russian ice hockey teams can compete in international tournaments again, the Court of Arbitration for Sport (CAS) ruled on Friday, meaning the men's side are set to be eligible.