Red Bull's Sebastian Vettel ignored team orders in the Malaysian Formula One Grand Prix to win an intense battle with Mark Webber.
Webber led after the final pit stops and the drivers were told to hold position to the end of the race but Vettel passed Webber after a tussle with 13 laps to go.
Vettel has since apologised for the incident.
Lewis Hamilton took third ahead of Mercedes team-mate Nico Rosberg, who obeyed an order to stay behind.
Ferrari's Fernando Alonso crashed on the second lap after breaking his front wing.
Vettel has a nine-point lead over Kimi Raikonen in the drivers championship.
The next round is in Shanghai in three weeks.