The risk of rain in the Belgian forests means it could be the second wet race in a row after Norris' win in Britain.
Piastri qualified second on the grid Saturday by less than a tenth of a second from Norris, with Ferrari's Charles Leclerc third and defending champion Max Verstappen fourth for Red Bull.
Piastri's leads Norris in the standings by nine points following Saturday's sprint race in Belgium. Verstappen held off both McLarens to take the sprint win, with Piastri second and Norris third.
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AP auto racing: https://apnews.com/hub/auto-racing
Credit: AP
Credit: AP