(CNN) -- Mark Webber stays on top of the Formula One world championship standings but Fernando Alonso's victory in the Singapore Grand Prix lifts him into a challenging second place.
Webber claimed the final podium position in Singapore with his Red Bull teammate Sebastian Vettel finishing a close second to Ferrari's Alonso.
But it proved a disastrous evening under the lights for McLaren's Lewis Hamilton, who collided with Webber on 36 of 61 laps and failed to finish for the second straight race.
The British star slips to third, with Vettel just one point behind him. His McLaren teammate Jenson Button claimed fourth at Marina Bay to maintain his slim chance of retaining the title.
The top five are divided by just 25 points, the value of a win, with four races left.
Red Bull have strengthened their chances in the constructors' championship with Ferrari also moving into the picture after Alonso's second straight win and an eighth place for Felipe Massa, who started from the back of the grid after a technical problem in final qualifying.
Drivers' Championship (after 15 rounds):
1. Mark Webber (Aus) Red Bull 202 points
2. Fernando Alonso (Spa) Ferrari 191
3. Lewis Hamilton (GB) McLaren 182
4. Sebastian Vettel (Ger) Red Bull 181
5. Jenson Button (GB) McLaren 177
6. Felipe Massa (Bra) Ferrari 128
7. Nico Rosberg (Ger) Mercedes 122
8. Robert Kubica (Pol) Renault 114
9. Adrian Sutil (Ger) Force India 47
10. Michael Schumacher (Ger) Mercedes 46
1. Red Bull 383 points
2. McLaren 359
3. Ferrari 319
4. Mercedes 168
5. Renault 133
6. Force India 60
7. Williams 57
8. Sauber 27
9. Toro Rosso 10