In coach Mark Hager's book, one player's misfortune opens the door for another - in this case Canterbury pair Jenny Storey, who missed out in last year's national squad, and midfielder Jordan Grant, after a strong national league and improved fitness levels, get a chance.
Britain are ranked third, the US 10th. New Zealand's last game against Britain was the bronze playoff at the London Olympics, when they were disappointing.
"They're both very physical, tough teams and very hard to play against," Hager said. "It's a different style to what we've been used to playing teams like Australia or Argentina, but they are two teams also building up to the World Cup, so it's an exciting time to see where we're at.
"It [also] gives an opportunity to try some players trying to break in against quality opposition."
So, the players get valuable international activity and Hager has an opportunity to sift through his options for the World Cup, to be played in The Hague in May-June.
The Black Sticks left for San Diego last night and have practice games on Sunday and Monday against Britain and the US respectively.