Serbia 's Viktor Troicki was suspended by the ITF for 18 months in July after being found guilty of failing to provide a blood sample during April 's Monte Carlo 's Masters . Notes Cilic has been issued with a nine - month ban after testing positive for banned substance . Traces of Nikethamide found in Croatian 's urine sample taken last week . Match backdated to May 2013 which means he can return on February 1 2014 . Cilic will take case to the Court of Arbitration for Sport .
Notes Cilic has been issued with a nine - month ban after testing positive for banned substance . Traces of Nikethamide found in Croatian 's urine sample taken last week . Match backdated to May 2013 which means he can return on February 1 2014 . Cilic will take case to the Court of Arbitration for Sport .