Matias Moroni insists Michael Cheika is making Argentina believe that they are good enough to defeat any team in the world.
The Pumas face England at Twickenham on Sunday, with the aim of keeping momentum going after a Rugby Championship that saw tem defeat both Australia and the All Blacks.
Ex-Australia boss Cheika, who guided The Wallabies to a World Cup final in 2015, has been credited with reshaping Argentina's fortunes.