Mercedes driver Valtteri Bottas of Finland pulls out of his garage during the second practice session at the Marina Bay City Circuit ahead of the Singapore Formula One Grand Prix in Singapore, Friday, Sept. 20, 2019. (AP Photo/Vincent Thian)

Ferrari driver Sebastian Vettel of Germany steers his car back to his garage during the first practice session at the Marina Bay City Circuit ahead of the Singapore Formula One Grand Prix in Singapore, Friday, Sept. 20, 2019. (AP Photo/Vincent Thian)

Ferrari driver Charles Leclerc of Monaco steers his car into pit-lane during the second practice session at the Marina Bay City Circuit ahead of the Singapore Formula One Grand Prix in Singapore, Friday, Sept. 20, 2019. (AP Photo/Vincent Thian)

Mercedes driver Lewis Hamilton of Britain pulls out of his garage during the second practice session at the Marina Bay City Circuit ahead of the Singapore Formula One Grand Prix in Singapore, Friday, Sept. 20, 2019. (AP Photo/Vincent Thian)

The crew for Red Bull driver Max Verstappen of the Netherlands push his car in pit lane during the first practice session at the Marina Bay City Circuit ahead of the Singapore Formula One Grand Prix in Singapore, Friday, Sept. 20, 2019. (AP Photo/Vincent Thian)

Mercedes driver Lewis Hamilton of Britain steers his car during the second practice session at the Marina Bay City Circuit ahead of the Singapore Formula One Grand Prix in Singapore, Friday, Sept. 20, 2019. (AP Photo/Vincent Thian)

Ferrari driver Charles Leclerc of Monaco prepares for the first practice session at the Marina Bay City Circuit ahead of the Singapore Formula One Grand Prix in Singapore, Friday, Sept. 20, 2019. (AP Photo/Vincent Thian)

Mercedes driver Lewis Hamilton of Britain pulls out of his garage during the second practice session at the Marina Bay City Circuit ahead of the Singapore Formula One Grand Prix in Singapore, Friday, Sept. 20, 2019. (AP Photo/Vincent Thian)