Gatland says Warburton is aware of the competition he faces in the back row if he is to start the first Test against the All Blacks on 24 June.
Warburton returned from a minor ankle injury to play over an hour in the midweek defeat by the Highlanders in Dunedin.
“He is fully aware that loose-forward trio went extremely well against the Crusaders,” Gatland said.
“This tour isn’t about Sam Warburton, it’s about putting the squad first, so if he isn’t involved in the first Test he will fully understand that.”
Elswehere, Ben Te’o is alongside Jonathan Davies in the midfield, with George North, Anthony Watson and Leigh Halfpenny in the back three.
Liam Williams does not feature in the matchday squad for the second successive game.
Mako Vunipola, Jamie George and Tadgh Furlong continue their combination in the front row.
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