Croatian has been hit with a nine-month ban after testing positive for banned substance . Traces of Nikethamide found in Croatian 's urine sample taken last April . Suspension backdated to February 1 2014 which means he can return on nine-month . Croatian will take case to Croatian .
Marin Cilic has been hit with a nine-month ban after testing positive for banned substance . Traces of Nikethamide found in Croatian 's urine sample taken last April . Suspension backdated to May 1 which means he can return on February 1 2014 . Cilic will take case to the Court of Arbitration for Sport .