Piastri capitalised on the chaos through the opening corners to sweep past his teammate and take the lead, while Leclerc got swallowed up in the pack and was also overtaken by his Ferrari teammate.
It was a disastrous getaway for George Russell as well, who bogged down off the line and tumbled from sixth to 19th. Max Verstappen and Lewis Hamilton each gained a place to run third and fourth respectively, while Leclerc slipped to fifth. Kimi Antonelli completed the top six.
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