"They were all pretty keen to play," Rennie said of his Maori representatives. "Our thinking behind that is all of those guys played pretty big minutes last night.
"We have other players who are fresh and keen and we've got confidence in so the rest of those guys will miss out."
Rennie has, however, been able to name at centre Tim Nanai-Williams, a man who created problems for Sonny Bill Williams when playing for Manu Samoa against the All Blacks at Eden Park and who could create similar issues for a Lions side which will be down on quality compared with the shadow test team who crushed the Maori.
The Chiefs will look to emulate the successful formula of the Blues and Chiefs in using an up-tempo game, but Rennie conceded it would not be easy.
"It's not a mystery," he said of the Chiefs' likely approach. "We like to use the ball, we try to play a high-tempo, high-skilled game of footy. The Lions have been excellent at choking teams from doing that so we've got a big challenge ahead of us."
He added of the Lions: "Clearly they've got better and better, haven't they? They were impressive last night and to be honest I thought they played pretty well against the Highlanders. They were in a position to nail that and in true Highlander fashion they never give in and stole it at the death.
"They've got a number of guys who will be keen to play a bit of test footy on this tour. Maybe it's a chance to scrap for some spots on the bench, I'd imagine their test XV will be nailed and will probably stay in Auckland, so I think they've got a lot to play for, likewise have our guys. We've got a few guys missing so they'll be keen to make a statement to the coaches before the business end of the [Super Rugby] competition."
Hamilton is of course familiar territory for Gatland, a former Waikato player and coach who had his homecoming last year tarnished by disappointment. This time he will be hoping for a far better performance from his Lions team and isn't likely to be subjected to any verbal digs from Rennie.
The Chiefs coach, asked about the banter starting to fly in earnest between Gatland and All Blacks coach Steve Hansen, said: "I tend to let my players do the talking on the field rather than enter into all that witty stuff. That's probably beyond me."
Chiefs to play Lions at Waikato Stadium on Tuesday (Chiefs caps in breackets):
1. Siegfried Fisi'ihoi (24)
2. Liam Polwart (2)
3. Nepo Laulala (11)
4. Dominic Bird (25)
5. Michael Allardice (20)
6. Mitchell Brown (14)
7. Lachlan Boshier (15)
8. Tom Sanders (19)
9. Finlay Christie (6)
10. Stephen Donald (c) (100)
11. Solomon Alaimalo (6)
12. Johnny Faauli (5)
13. Tim Nanai-Williams (82)
14. Toni Pulu (21)
15. Shaun Stevenson (21)
Reserves:
16. Hika Elliot (116)
17. Aidan Ross (2)
18. Atu Moli (24)
19. Liam Messam (159)
20. Mitchell Karpik (5)
21. Jonathan Taumateine (6)
22. Luteru Laulala (0)
23. Chase Tiatia (0)