F1's two world championship titles could be settled as early as this weekend's United States GP in Austin - and here's how.
Following his win in Japan, Lewis Hamilton has his first chance of clinching his fourth drivers' championship ahead of Sebastian Vettel and Valtteri Bottas, while Mercedes are strong favourites to wrap up their fourth constructors' crown in succession.
Here's the maths for both those two historic events can happen...
HOW LEWIS HAMILTON CAN WIN THE DRIVERS' CHAMPIONSHIP
Hamilton needs to outscore Vettel by 16 points AND Bottas by three points in Austin to take the 2017 title with three races to spare.
If Hamilton wins, he is world champion if Vettel finishes sixth or lower
If Hamilton finishes second, he is world champion if Vettel finishes ninth or lower and Bottas fails to win
If Hamilton finishes third, the title race goes on to Mexico
HOW MERCEDES CAN WIN THE CONSTRUCTORS' CHAMPIONSHIP
Holding a 145-point lead over Ferrari, Mercedes will win the Constructors' Championship for the fourth year in succession if they finish the Austin weekend holding a lead of at least 129 points.
That means Ferrari must outscore Mercedes by at least 17 points to keep in mathematical contention until Mexico.
Mercedes are certain to clinch the Constructors' Championship if they win the race
Mercedes are also certain to win the Constructors' Championship if Ferrari finish off the podium