Lewis Hamilton has won the Singapore Grand Prix to open up a 28-point lead at the top of the standings after Sebastian Vettel crashed out just one lap in.
Starting in pole, Vettel was out almost instantly due to a start-line crash that also eliminated Max Verstappen and teammate Kimi Raikkonen.
Hamilton duly took the lead and remained there throughout what was a dangerous, rain-affected race, with Red Bull's Daniel Ricciardo finishing three seconds ahead of Hamilton's teammate Valtteri Bottas for second place on the podium.
The result means that Hamilton now has a healthy - and potentially decisive - advantage over Vettel in the driver standings with just six races of the season remaining.
Singapore GP top 10:
1. Lewis Hamilton (Mercedes)
2. Daniel Ricciardo (Red Bull)
3. Valtteri Bottas (Mercedes)
4. Carlos Sainz (Toro Rosso)
5. Sergio Perez (Force India)
6. Jolyon Palmer (Renault)
7. Stoffel Vandoorne (McLaren)
8. Lance Stroll (Williams)
9. Romain Grosjean (Haas)
10. Esteban Ocon (Force India)