Lewis Hamilton can clinch his fourth world drivers’ championship title at this weekend’s Mexican Grand Prix.
He has to score nine points, the equivalent of any top-five finish, to make it a mathematical certainty, even if rival Sebastian Vettel wins the race.
If the four-time champion Vettel finishes second for Ferrari, Hamilton only needs a top-nine finish in his Mercedes to claim the title.
And if Vettel is third or worse in the race, Hamilton will be champion even if he fails to finish.
After claiming his ninth win of the season in Texas last weekend, Hamilton has a total of 331 points and Vettel has 265.
With three races remaining, Vettel cannot overhaul him on race wins as he has won only four so far this year ahead of the contests in Mexico City, Sao Paulo and Abu Dhabi.
It leaves Vettel hoping to win and then see Hamilton fail to finish in the points for him to keep his championship challenge alive.
A race winner scores 25 points, second scores 18 and third 15, fourth wins 12, fifth 10, sixth eight, seventh six, eighth four, ninth two, and 10th scores one point.