NEW DELHI, India - Never mind ripping up the form book, it would have to be thoroughly shredded - and the remains pulped for good measure - for Sebastian Vettel to be denied a fourth successive Formula 1 title on Sunday.Everything indicates that Red Bull's 26-year-old championship leader will become the sport's youngest quadruple champion with a flourish in what may well be F1's last appearance in India for the foreseeable future. Since the race made its debut in 2011, Vettel has led every lap in India and arrives chasing a hat-trick of poles and wins at the Buddh International circuit in Greater Noida, south of the capital.COMFORTABLE LEADWith a 90-point lead over Ferrari's Fernando Alonso and four races remaining, Vettel may not even need to finish on Sunday to become only the third driver to win four titles in succession. Alonso is the only man who can keep him waiting for the second race in a row and even victory will not be enough if Vettel takes at least fifth place. If the Spaniard retires, the matter will be settled on the spot.Vettel has retired only once this season and finished at least fourth in all the other races. Even if the German fails to score, Alonso must still finish first or second to stay mathematically in contention. The Red Bull driver is on a roll that could lead to more rewriting of the record books after he notched up five wins in a row in Japan in October to become the first driver since Michael Schumacher in 2004 to perform that feat.Nobody, least of all his rivals, is ruling out Vettel winning the remaining races of 2013 to take his tally to nine in a row and equalling a record set by Italy's Alberto Ascari 60 years ago.Mercedes driver Lewis Hamilton said after Suzuka: "If he doesn't have any reliability issues, I am willing to put money on it."NICE TROPHYAlonso meanwhile has not won since his home race in Spain in May and although he has finished second on five occasions in 2013, Vettel took the chequered flag ahead of him in four of them. The last time the Ferrari driver finished in the top two with Vettel drawing a blank was in Valencia in June 2012 - 28 races ago.Alonso can hope to be third time lucky, after finishing third in 2011 and second in 2012, but India is very much Vettel's track and Ferrari's main concern now is to beat Mercedes and hold on to second place in the Constructors' Championship.Ferrari are only 10 points clear of Mercedes, with Lotus a further 23 adrift after outscoring both teams in the last two races, in a battle that is about prize money as much as paddock status. Red Bull can also retain the Constructors' title for the fourth year in a row on Sunday as an added bonus.Vettel said: "So far everything has always gone perfectly for us in India. There is also a very nice trophy at the end of the race - so it would be great to hold one again in 2013."It could be the last chance anyone has to get their hands on it. India is not on the 2014 calendar and although local organisers are talking about a return in 2015 few paddock insiders are optimistic. The teams and organisers have been vexed by taxation issues while also wrestling with financial problems and slow ticket sales after drawing a big crowd to the inaugural event.Sauber's Indian-born principal Monisha Kaltenborn said: "I think it is very difficult once you leave a country to come back to it - especially where we have not really managed to establish the sport." Stay with Wheels24 for the 2013 Indian GP weekend.