Australia has secured the Ashes urn with a 3-1 lead heading into the fifth and final Test against England. While Australia aims to cap off the series with another win, England seeks to end on a high note with a second consecutive victory. Key players for Australia include Travis Head and Steve Smith, with Todd Murphy potentially playing a crucial role due to the turning Sydney pitch. England's 'Bazball' approach faces challenges adapting to the conditions and Australia's bowling attack.