Australian Open 2018 Final: Roger Federer Beats Marin CilicHighlights from the 2018 Australian Open final, where Roger Federer defeated Marin Cilic to win his sixth title in Melbourne and 20th career Grand Slam. SI Staff | Jan 28, 2018Australian Open 2018 Final: Roger Federer Beats Marin Cilic / Clive Brunskill/Getty ImagesQuinn Rooney/Getty ImagesClive Brunskill/Getty ImagesMark Kolbe/Getty ImagesPAUL CROCK/AFP/Getty ImagesQuinn Rooney/Getty ImagesWILLIAM WEST/AFP/Getty ImagesSAEED KHAN/AFP/Getty ImagesSAEED KHAN/AFP/Getty ImagesClive Brunskill/Getty ImagesMichael Dodge/Getty ImagesWILLIAM WEST/AFP/Getty ImagesSAEED KHAN/AFP/Getty ImagesSAEED KHAN/AFP/Getty ImagesQuinn Rooney/Getty ImagesWILLIAM WEST/AFP/Getty ImagesSAEED KHAN/AFP/Getty ImagesPublished Jan 28, 2018SI STAFF