Ahead of the opening race of the 2018 Formula One season in Australia on March 25, we take a look at how each team is shaping up for the new campaign.

Here we assess what is in the offing for Toro Rosso after an off-season of changes.

HOW DID THEY PERFORM IN 2017?

Despite using five drivers across the course of the season, Toro Rosso managed to finish seventh in the constructors' championship – just four adrift of Renault.

However, Carlos Sainz Jr was responsible for 48 of those points and is no longer with the team having been loaned to Renault for the final four grands prix of the season.

Daniil Kvyat was dropped for Pierre Gasly towards the back end of the year, but Toro Rosso will be hoping that decision stands them in good stead for 2018.

THE 2018 LINE-UP

Pierre Gasly

The 22-year-old's protracted move into a regular seat came at last year's Malaysian Grand Prix and, although he failed to finish in the points in his five outings, expectations are high. Gasly, a GP2 champion in 2016, will be eager to make his mark.

Brendon Hartley

Two races after Gasly got his first start, Hartley was put behind the wheel of an F1 car for the first time in his career. The 28-year-old New Zealander claimed his second World Endurance Championship title in 2017 in a campaign that included his first triumph at the 24 Hours of Le Mans, showing he has the pedigree to mix it with the best.

THE TO-DO LIST

- After swapping Max Verstappen for Kvyat in 2016 and using five drivers last year, a settled line-up is needed if Toro Rosso are to avoid finishing towards the bottom end of the constructors' championship. They have a mix of potential and experience with Gasly and Hartley and should stick with it.

- Honda's return to F1 proved an unmitigated disaster with McLaren. Toro Rosso will need to work extremely closely with their new power-unit suppliers to hammer out any reliability issues like the ones that dogged the Woking-based team.

HOW WILL THEY FARE?

Toro Rosso have enjoyed solid testing at Barcelona, with Pierre Gasly recording one of the best times on the hypersoft tyre, though it was over one and a half seconds slower than Sebastian Vettel. Their performance will largely depend on Honda, and whether they have improved sufficiently to power a competitive car.