"On this tour there will be opportunities handed to players who didn't play much, or at all, against China. We are serious about becoming a team that is capable of winning six games at the Games and winning a gold medal.
"There's five warm up matches left and we must improve in every one of those."
Riley's absence should see German-based fullback Anna Green enjoy more game time, while Annalie Longo and Betsy Hassett appear the front runners to fill Yallop's boots in midfield after being used off the bench against China.
Holly Patterson and Katie Bowen who have both played in defence and midfield for New Zealand should also see some action as they push for Olympic places.
Hannah Wilkinson and Rebecca Smith had their on-field minutes restricted against China as medical staff managed their recovery from injury, but could both see more time against Australia.
Readings was expecting a more physical approach from the Australians and, while he said he may tinker with formations in the upcoming matches, he was backing the Ferns new possession-based style of play to reap rewards.
"We're adopting a style that gives us more opportunities to win matches against a variety of teams and the long-term pay-off will be worth it."