Key Black Stick Kayla Whitelock is confident her body's coming good at the right time.

Whitelock missed the first two games of New Zealand's Champions Trophy hockey campaign in London with a quad injury, but returned for the win over Great Britain.

The veteran midfielder says she's recovered well from that game, and is ready to take on Argentina overnight.

Whitelock says they didn't want to push it too early.

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The game is at 1:30am, with New Zealand still in the hunt to make the medal matches.