Who were the standout drivers — good, bad or otherwise — of 2018?

Valtteri Bottas in his garage at the 2018 Brazilian Grand Prix.

Valtteri Bottas must lift against teammate Lewis Hamilton to extend his Mercedes contract beyond 2019.

Valtteri Bottas on the grid at the 2018 Brazilian Grand Prix.

With the seatless Esteban Ocon breathing down his neck, Valtteri Bottas needs a big 2019 to keep his Mercedes drive.

Lewis Hamilton an track during practice at the 2018 Mexican Grand Prix.

Mercedes needs to improve “lots of different things” to vie for pole at the Mexican Grand Prix.

Valtteri Bottas in his car at the 2018 United States Grand Prix.

Valtteri Bottas could be the difference between Hamilton winning the title this weekend and Vettel taking it one more round.

Mercedes cast Valtteri Bottas as Lewis Hamilton’s wingman at the Russian Grand Prix.

Valtteri Bottas in his garage at the 2018 Russian Grand Prix.

Valtteri Bottas and Lewis Hamilton were untouchable in qualifying, leaving Sebastian Vettel third.

There’s plenty of interest in this year’s Russian Grand Prix beyond the appearance of Vladimir Putin.

Valtteri Bottas on track at the 2018 Austrian Grand Prix.

Valtteri Bottas was flawless in qualifying to better his teammate in the battle for Austrian pole.

Valtteri Bottas in his garage at the 2018 Spanish Grand Prix.

Valtteri Bottas has raised his game this year, even if the points don’t show it.