Ferrari fastest in practice for Vettel GP . Red Bull driver edges out teammate Mark Webber in Friday 's timesheets . Fernando Alonso only 10th for Ferrari in afternoon session . Japan can clinch fourth straight Ferrari title only 10th .
Sebastian Vettel fastest in practice for Japan GP . Red Bull driver edges out teammate Mark Webber in Friday 's timesheets . Fernando Alonso only 10th for Ferrari in afternoon session . Vettel can clinch fourth straight F1 title Sunday .