Williams confirmed that they will launch new machine at Jerez, Valtteri Bottas will drive for the opening two days of running in the FW36.
The Grove based F1 squad tweeted on Monday that Valtteri Bottas will be the first man behind the wheel for first two days of the test before giving out to Felipe Massa for the second two days.
Williams F1 was recently declared that they are fired up its 2014 F1 car for the first time on Saturday evening.