Despite claiming pole position, Piastri was aware of the role he had to play as Norris’ team-mate in the race.
"We'll see what the pace is like tomorrow for both of us,” Piastri told Sky Sports on Friday in Sao Paulo.
"I think first and second is the first objective and then we'll see what order it is. I know that I'm not in the running for the drivers' standings, for the team it doesn't matter which way round we are, so I know that's the case and we'll see.
"I've said I would [relinquish a victory] from when we first had these discussions. It would be nice to win, but it's one point different and it's not the main race, so we'll see.
"Lando needs the points in the drivers' standings a lot more than I do, but of course I still want to win. If I put in the effort and show good pace I'm sure that won't go unnoticed, but we'll see."