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Lando Norris beat McLaren team-mate Oscar Piastri to win a chaotic wet-dry Miami Grand Prix sprint race with help from the safety car.

Piastri led from lap one after passing pole-sitter Kimi Antonelli's Mercedes at the first corner of the race but the safety car cost the Australian the race win.

Piastri pitted one lap before Norris as the track dried out but the safety car was sent out while Norris was pitting for his slick tyres.

The safety car was caused by a crash between Fernando Alonso's Aston Martin and Liam Lawson's Racing Bull at Turn Two but that was not the only drama in the race.

Norris resumed with a two-second lead and as the race finished under the safety car the win was secured.