Sebastian Vettel needs to score just a single point at Suzuka in two weeks to put the lid on his second title.
The German could have wrapped up the championship under Singapore's lights, but despite Vettel's victory Jenson Button spoiled the mathematics by finishing second. Webber was third, nearly half a minute adrift.
Briton Button is now the only driver still technically in the running with five races still to run.
But with Vettel needing just a tenth place in Japan in the event that Button wins, BBC commentator Martin Brundle observed: "They might as well give him (Vettel) the pot."
Vettel can only lose the championship if McLaren's Jenson Button wins not only in Japan but also the four races after it.
That Button can take victory away from Vettel is "not likely", Red Bull consultant Marko told German television Sky in Singapore.
"In this field there is no one else strong enough to win the last five races," added the Austrian.
Red Bull boss Christian Horner however suggested it is unlikely the 24-year-old will simply cruise to a mid-pack finish at Suzuka.
"If he keeps going as he has been the championship will take care of itself," he said. "It has been a great season and we want to end it in style."
Agreed Vettel: "It looks like we will have another chance at the next race."
“I am very, very pleased with the result today, the car was fantastic all the way through. When we needed to push, we could pull away quite easily, which helped us."
"When the safety car came out, it didn't really fit to our plan as we had a gap of about thirty seconds with thirty laps to go, but nevertheless I had a very good restart. I was a bit lucky that there were some back markers between me and Jenson and I was able to get back into the rhythm straight away," Vettel added.
Singapore GP Results
|2||Jenson Button||+1.7 secs|
|3||Mark Webber||+29.2 secs|
|4||Fernando Alonso||+55.4 secs|
|5||Lewis Hamilton||+67.7 secs|
|6||Paul di Resta||+111.067 secs|
|7||Nico Rosberg||+1 Lap|
|8||Adrian Sutil||+1 Lap|
|9||Felipe Massa||+1 Lap|
|10||Sergio Perez||+1 Lap|
Season Driver Results
Season Team Results
Webber On Finishing Third, Bowing Out Of The Title Race
“Unfortunately I’ve found myself having to come back through the field too often this season. I can't make the starts I made last year at the moment. I need to work on those; we'll look at them and definitely improve."
"I have to keep working harder because it’s quite frustrating and it's quite risky to have to come back through and try to regain positions on the track, particularly when the DRS isn't working. In the end I probably lost a position today out of that, JB put a good last stint together so it would have been good battle with him, even if he did have track position."
"Seb deserved the victory today and overall, if you come here and you get a podium, it’s not too bad. Of course you'd love a win, that's what we all strive for, but this is a very challenging venue. The guys have done a great job all weekend, for me in particular – as it’s not the easiest track for me here."
"I want to thank all the guys – they’ve done a great job for me all weekend and Renault also – we have had 100 percent reliability, so a great job.”
Singapore fireworks as Massa shoves Hamilton
There was fireworks in the sky after the Singapore night race and then fireworks in the paddock between Lewis Hamilton and Felipe Massa.
Brazilian Massa, highly critical of Hamilton's aggressive driving in the past, was annoyed with the McLaren driver after a qualifying incident and then enraged after the race.
Hamilton was penalised for puncturing Massa's rear tyre, and so the Ferrari driver returned the favour whilst the Briton was being interviewed by German television after the race.
Eyewitness observers said Massa physically pulled Hamilton and slapped his shoulder whilst sarcastically saying "congratulations".
"Massa lays into Lewis verbally and then said to have shoved him in TV scrum," The Times' Kevin Eason revealed on Twitter.
And the Telegraph's Tom Cary quotes Massa as saying: "Lewis cannot use his mind".