Toro Rosso and Sauber are the latest teams to confirm their driver schedule for the first Winter Test that begins on Monday. The Red Bull junior team will formally launch their 2018 challenger – the STR13 – in the pit lane at the Circuit de Catalunya before the first four-hour morning session begins, even though an online leak led to the car already being revealed on a filming day last week. Once the car is officially launched, Brendon Hartley will hopefully be able to run the Honda engine without any of the issues that McLaren had this time last year. After a full day’s running, Hartley will hand the car over to his team-mate Pierre Gasly on Tuesday. Hartley will return to the STR13 on Wednesday before Gasly gets his second day of action on Thursday. Sauber also revealed their line-up on Sunday morning and have followed suit with their two main drivers getting two days each. Mercedes, Renault and McLaren are the only other teams who have yet to reveal their plans.