Mark Webber extended his championship lead to 11 points on Sunday night, despite finishing on the lowest step of the podium and colliding with Lewis Hamilton during a long and hot Singapore grand prix.

The Australian finished behind pole sitter and winner Fernando Alonso, as well as his Red Bull teammate Sebastian Vettel.

At the chequered flag just before the 2 hour time limit was up, Ferrari's Spaniard and German Vettel were separated by just 3 tenths of a second.

But Vettel's points gap to Webber, who was a further half minute behind the leading battle at the finish, is still more than 20 points.

Webber's closest challenger is now Alonso, who has won the last two races from pole position in the resurgent Ferrari.

He leapfrogs Hamilton in the drivers' standings, after the Briton retired for the second race in a row due to a collision.

This time his clash was with Webber, whose RB6 was sporting significant damage to its wheel and tyre in parc ferme after the race.

Hamilton's MP4-25 came off worse, and he came close to writing off his title chances after retiring at mid-distance.

"Let's just hope myself or Jenson can do it," said the 2008 world champion, who remains five points ahead of teammate Jenson Button's sister car.

"20 points is massive and with four races to go that is a big gap," Hamilton told reporters.

Button confirmed: "There is everything to play for."

Pos No Driver Team Laps Time/Retired Grid Pts
1 8 Fernando Alonso Ferrari 61 1:57:53.579 1 25
2 5 Sebastian Vettel RBR-Renault 61 +0.2 secs 2 18
3 6 Mark Webber RBR-Renault 61 +29.1 secs 5 15
4 1 Jenson Button McLaren-Mercedes 61 +30.3 secs 4 12
5 4 Nico Rosberg Mercedes GP 61 +49.3 secs 7 10
6 9 Rubens Barrichello Williams-Cosworth 61 +56.1 secs 6 8
7 11 Robert Kubica Renault 61 +86.5 secs 8 6
8 10 Nico Hulkenberg Williams-Cosworth 61 +112.8 secs 17 4
9 7 Felipe Massa Ferrari 61 +113.3 secs 24 2
10 14 Adrian Sutil Force India-Mercedes 61 +122.4 secs 15 1
11 12 Vitaly Petrov Renault 60 +1 Lap 12  
12 17 Jaime Alguersuari STR-Ferrari 60 +1 Lap 11  
13 3 Michael Schumacher Mercedes GP 60 +1 Lap 9  
14 16 Sebastien Buemi STR-Ferrari 60 +1 Lap 13  
15 25 Lucas di Grassi Virgin-Cosworth 59 +2 Laps 20  
16 19 Heikki Kovalainen Lotus-Cosworth 58 +3 Laps 19  
Ret 24 Timo Glock Virgin-Cosworth 49 Hydraulics 18  
Ret 22 Nick Heidfeld BMW Sauber-Ferrari 36 Accident 14  
Ret 2 Lewis Hamilton McLaren-Mercedes 35 Accident 3  
Ret 20 Christian Klien HRT-Cosworth 31 Hydraulics 22  
Ret 23 Kamui Kobayashi BMW Sauber-Ferrari 30 Accident 10  
Ret 21 Bruno Senna HRT-Cosworth 29 Accident 23  
Ret 18 Jarno Trulli Lotus-Cosworth 27 Hydraulics 21  
Ret 15 Vitantonio Liuzzi Force India-Mercedes 1 Accident damage 16

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