According to Metro.co.uk, Vettel goes into the last six grand prix races with a 60-point cushion to nearest rival Fernando Alonso, while Red Bull are 103 points clear of Ferrari in the constructors' standings.
Alonso has already conceded, only a considerable amount of good luck can give him any sort of chance, starting on Sunday in the Korean Grand Prix in the country's far-flung outpost of Mokpo, the report said.
However, Horner said that it was his job to worry and so, the team could not become complacent in any way, adding that they had not yet, and would not be this year too.
He said that their approach was one race at a time, with the next challenge being Korea and if they keep doing that, the championship tables would take care of themselves.
Horner added that the team's job was also to win it as soon as possible, it was not their responsibility to take it to the last race, which they hopefully won't do this year. (ANI )