Stallone did , however , go on to receive much approval for his role in the crime drama Cop Land ( 1997 ) in which he starred alongside Robert De Niro and Ray Liotta . The film was only a small success at the box office . Stallone did , however , go on to receive much acclaim for his role in the low budget crime drama Cop Land ( 1997 ) in which he starred alongside Robert De Niro and Ray Liotta , but the film was only a minor success at the box office .