Australia’s players have been urged to stay grounded as they target a second slice of women’s rugby history in the space of a week against Japan in Sydney.

The Wallaroos are favoured to make it two-from-two in the final Test at North Sydney Oval on Friday, following last week’s 34-5 win in Newcastle.

Never in their 50 Tests spanning 25 years has the women’s team won a bilateral series.

In their defence, they haven’t played many, with World Cup matches making up more than half their program since entering the international game in 1994.

The Wallaroos have lost four series to powerhouse New Zealand and went down 2-0 to England in 2001.

Last week’s win over 16th-ranked Japan was Australia’s first-ever win on home soil in 10 attempts.

It left captain Grace Hamilton determined her seventh-ranked team don’t take their foot off the throat.

“We have to back it up and that’s the hardest thing to do,” Hamilton told journalists.

“I know it was really special not only for us but for girls who have been in the Wallaroos squad for a number of years to get the win, first on home soil, but we hope to get another one on Friday.”

Hamilton was impressed with how her team absorbed early Japan pressure and shook off the frustration of a glut of handling errors.

She said an improved performance will be important three weeks out from the two-Test series against the world champion Black Ferns, in Perth and Auckland.