Double world champion Sebastian Vettel won the Korean Grand Prix in crushing fashion on Sunday to help his Red Bull team retain the Formula One constructors' title after a dominant season. Just a week after cruising to third place in Japan, where Vettel confirmed himself as the 2011 drivers' world champion, the 24-year-old German was uncatchable as he drove to his 10th win this year, and 20th of his career.He came home in a winning time of one hour, 38 minutes and 1.994 seconds, 12.019 ahead of Hamilton, who drove a splendidly controlled defensive race to stay ahead of Vettel's Red Bull team-mate Mark Webber.The Australian finished third, ensuring Red Bull clinched their second successive team title, ahead of Briton Jenson Button in the second McLaren, and two-time champion Spaniard Fernando Alonso of Ferrari.Meanwhile, Sahara Force India returned with one point from Korean Grand Prix as Paul di Resta finished ninth and Adrian Sutil just ended outside the top-10 bracket.