McLaren team boss Andrea Stella thinks Oscar Piastri sitting out FP1 for rookie Leonardo Fornaroli had a bigger impact on his Hungarian GP weekend than not trialling the team's new floor until Saturday.
Piastri has been on the back foot compared to team-mate Lando Norris all weekend in Budapest, by first having to cede his car to rookie runner Fornaroli in FP1, and then remaining on the team's original specification in FP2 while the team tested the latest upgrades on Norris' car.