F1 2018: Assessing each team's chances in the new season 

It will be interesting to see how Honda and Toro Rosso will work together

Toro Rosso Honda

The fourth works team on the grid; with engine partner Honda on a mission to prove their mettle, after a humiliating stint with McLaren.

Looks the most stable team in terms of driver pairing with Gasly and Hartley. Toro Rosso encouragingly and surprisingly, raked up the most mileage in the first leg of winter testing.

It's the RedBull B team and how they perform holds key to whether Red Bull too switches to Honda in 2019. They are aiming for fourth, however lower midfield seems to be their likelier default position.