Northern Ireland 's Gurney overcame Austria 's Mensur Suljovic in a deciding leg as he moved into the last 16 for the first time .
Northern Ireland 's Gurney returned to action on Friday after a month sidelined with a broken bone in his throwing hand .
Northern Ireland 's Gurney , who returned to action on Friday after a month sidelined with a broken bone in his throwing hand , overcame Austria 's Mensur Suljovic in a deciding leg as he moved into the last 16 for the first time .