Readings said Spain were an opponent that reflected some of the characteristics of the Ferns' own rise up the rankings while they would be tested by some traits which mirror the powerhouse Spanish men's side.
"It's going to be a very tough test. They are a team much like us that have really grown and improved in the last few years.
"They are team that have beaten England recently, they are team that don't concede many goals and they are also team that's got very good individuals that can break you down. They are similar to the men's team in some ways but different in others and we know it's going to be very tough to score goals against them.
The games will be played on Wednesday and Friday (NZT) in Guadalajara and La Roda respectively.
Football Ferns squad: Goalkeepers: Cushla Lichtwark, Erin Nayler. Defenders: CJ Bott, Abby Erceg, Meikayla Moore, Ria Percival, Ali Riley, Rebekah Stott. Midfielders: Katie Bowen, Daisy Cleverley, Betsy Hassett, Katie Hoyle, Annalie Longo, Evie Millynn, Kirsty Yallop, Forwards: Sarah Gregorius, Amber Hearn, Jasmine Pereira, Rosie White, Hannah Wilkinson