May 24, 2018

Pierre Gasly on track in the Toro Rosso

© Dan Istitene/Getty Images

May 24, 2018

Brendon Hartley on track in the Toro Rosso

© Charles Coates/Getty Images

May 24, 2018

Brendon Hartley on track in the Toro Rosso

© Dan Istitene/Getty Images

May 24, 2018

Pierre Gasly on track in the Toro Rosso

© Dan Istitene/Getty Images

May 24, 2018

Pierre Gasly in the cockpit of Toro Rosso STR13

© Peter Fox/Getty Images

May 24, 2018

Pierre Gasly out of the Toro Rosso garage

© Peter Fox/Getty Images

May 24, 2018

Brendon Hartley looks on from the Toro Rosso cockpit

© Peter Fox/Getty Images

May 24, 2018

Brendon Hartley talks with engineer in the garage

© Peter Fox/Getty Images