CAS made their decision in May 2012 , denying Lokomotiv 's appeal .
In March 2012 , Court of Arbitration for Sport began considering Grigoryev 's case .
Court of Arbitration for Sport made Court of Arbitration for Sport 's decision in May 2012 , denying Lokomotiv 's appeal .
In March 2012 , Court of Arbitration for Sport began considering Grigoryev 's case .