Formula 1 teams have stayed on at the Bahrain International Circuit for the first in-season test, which takes place this Tuesday and Wednesday.
The two days of action, in which each team is permitted to field one car, will enable squads to address any issues from the opening three rounds, and undertake crucial development work, ahead of a busy phase of the season.
With 50 per cent of in-season test time required to be handed over to young drivers, classified as those who have competed in two or fewer Grands Prix, several teams will be running unfamiliar faces.
Pierre Gasly will be in action for Red Bull, Oliver Turvey will link up with McLaren, Renault test driver Sergey Sirotkin receives a run with the manufacturer, while Formula 2 racer Sean Gelael will make his Formula 1 bow with Toro Rosso.
Alfonso Celis Jr. (Force India) and Gary Paffett (Williams) will also conduct testing duties with their respective teams.
Mercedes, Haas and Sauber, meanwhile, will dedicate the entirety of their track time to regular racers, meaning they must field a young driver on both days of running at the next test, which takes place at the Hungaroring in August.
One day of Ferrari's running will be conducted in association with Pirelli as part of Formula 1's tyre testing programme; Antonio Giovinazzi, who raced for Sauber in Australia and China, is set to sample the SF70-H for the first time.
