McLaren's Lando Norris won a chaotic sprint race at the Miami Grand Prix on Saturday, pipping championship leader and team-mate Oscar Piastri.

Ferrari's Lewis Hamilton finished third while 18-year-old Italian Kimi Antonelli, who had started on pole for Mercedes, finished in tenth.

Antonelli lost his lead at the first turn where Piastri forced him wide and when he returned to the track he was down in fourth.

The race got underway after a 25-minute delay due to torrential rain.

Ferrari's Charles Leclerc crashed out during the formation lap, hitting the wall after aquaplaning.

During the race, Fernando Alonso crashed into the wall after he was clipped by Liam Lawson, and Carlos Sainz also crashed.

There was a contact incident in the pit-lane, when Red Bull's Max Verstappen pulled out into Antonelli. (AFP)