Hager, who has named 20 players - two more than usual - is also clear on what he wants out of this trip. Consistency has been a concern for the world No 6-ranked Black Sticks. That has to be sorted out before London.
"Our defence is one area we're trying to improve this year, and it's slowly getting better," Hager said. "And our set piece is an area I'd really like to improve. We haven't quite gelled."
The leading hockey players get more international experience in a year than most other athletes.
The women's Black Sticks average about 30 matches a year. In Hager's book it's not until players have racked up about 50 internationals - which can be accrued in roughly 18 months - that a valid assessment can be made on whether they will really press on at the highest level.
"We are such a young group. That's the biggest issue. Most of our players have had over 50 caps and do need to start becoming consistent.
The Olympic squad, plus two travelling reserves who will stay outside the Games village, will be named shortly after the Black Sticks return from Korea on June 9.
* The No 7-ranked men's Black Sticks, battling a bug plaguing several players in the squad, still kicked off their Azlan Shah tournament in Malaysia with a thumping 5-1 win over India yesterday.
Their second game was against ninth-ranked Argentina early today.
NZ team for Asian tour
Kayla Sharland, Emily Naylor, Melody Cooper (Central), Krystal Forgesson, Katie Glynn, Julia King, Samantha Harrison (Auckland), Petrea Webster, Rhiannon Dennison, Biana Russell, Stacey Michelson (North Harbour), Sally Rutherford, Samanthan Charlton, Clarissa Eshuis, Cathryn Finlayson, Gemma Flynn (Midlands), Ella Gunson, Charlotte Harrison (Northland), Anita Punt (Capital), Bridget Blackwood (Canterbury).