Bottas, Vettel lead Chinese GP practice sessions

Ferrari driver Sebastian Vettel of Germany prepares for the first practice session of the Chinese Formula One Grand Prix at the Shanghai International Circuit in Shanghai on Friday, April 12, 2019. (AP Photo/Ng Han Guan)

Mercedes driver Lewis Hamilton of Britain steers out of the garage during the first practice session of the Chinese Formula One Grand Prix at the Shanghai International Circuit in Shanghai on Friday, April 12, 2019. (AP Photo/Ng Han Guan)

Ferrari driver Sebastian Vettel of Germany prepares for the first practice session of the Chinese Formula One Grand Prix at the Shanghai International Circuit in Shanghai on Friday, April 12, 2019. (AP Photo/Ng Han Guan)

Ferrari driver Charles Leclerc of Monaco prepares for the first practice session of the Chinese Formula One Grand Prix at the Shanghai International Circuit in Shanghai on Friday, April 12, 2019. (AP Photo/Ng Han Guan)

Ferrari driver Sebastian Vettel of Germany, left, chats with Mercedes driver Lewis Hamilton of Britain after attending an autograph session at the Shanghai International Circuit ahead of the Chinese Formula One Grand Prix in Shanghai, China, Thursday, April 11, 2019. (AP Photo/Andy Wong)

Ferrari driver Sebastian Vettel of Germany prepares for the first practice session of the Chinese Formula One Grand Prix at the Shanghai International Circuit in Shanghai on Friday, April 12, 2019. (AP Photo/Ng Han Guan)

Mercedes crew push the car of Lewis Hamilton past promotional board for the Chinese Formula One Grand Prix at the Shanghai International Circuit in Shanghai on Friday, April 12, 2019. (AP Photo/Ng Han Guan)

Ferrari driver Sebastian Vettel of Germany steers out of the garage during the first practice session of the Chinese Formula One Grand Prix at the Shanghai International Circuit in Shanghai on Friday, April 12, 2019. (AP Photo/Ng Han Guan)

Ferrari driver Sebastian Vettel of Germany prepares for the first practice session of the Chinese Formula One Grand Prix at the Shanghai International Circuit in Shanghai on Friday, April 12, 2019. (AP Photo/Ng Han Guan)