"It's a long time since we came here, first of all to qualify for a World Cup but now we're also playing the round of 16," the 30-year-old told reporters.
"It's big for us and that's why I'm so proud of the whole team but, of course, we're hungry for more."
It was a sentiment shared by Harder, a former team mate of Kerr's at Chelsea.
The Danes can take heart from the impeccable form of their own captain, who earned her maiden World Cup goal with a 21st minute penalty against Haiti.
Denmark forward Signe Bruun fouled Haiti goalkeeper Kerly Theus' outside the box and amidst the chaos substitute Mille Gejl's cross from the right was guided home by Harder.
Persons:
Pernille Harder, Luisa Gonzalez PERTH, Denmark's, we're, Lars Sondergaard's, Sam Kerr, Harder, Kerr's, I've, she's, Signe Bruun, Kerly Theus, Mille, Sondergaard, Joel Dubber, Ken Ferris
Organizations:
Soccer Football, FIFA, REUTERS, Haiti, Olympic, Canada, Australia, Thomson
Locations:
New Zealand, Haiti, Denmark, Perth, Australia, Sydney, China, Chelsea