Perez and Zhou to receive F1 US GP grid drops after engine changes

The FIA confirmed following the start of opening practice at the Circuit of The Americas that Red Bull's Perez and Alfa Romeo driver Zhou had taken an additional engine component since the last race in Japan.
In both cases, it is their fifth internal combustion engine of the season, meaning both Perez and Zhou will drop five places on the grid from their qualifying position on Saturday.
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