Romero ndiye muchengeti wepagedhi ane mikana yakawanda kwazvo munhoroondo yetimu yenyika yeArgentina, achitamba kanopfuura ka90 kubva paakatanga muna 2009. Akamirira Argentina pamakwikwi maviri eWorld Cup uye pamakwikwi matatu eCopa América, achipedza semumhanyi mu2014 FIFA World Cup, pamwe ne2015 ne2016 Copa América
mitambo. Aivawo muchikwata chakanga chahwina ndarama kumaOlympics a2008.