Replacement driver fastest in practices for Sakhir GP

Mercedes driver George Russell of Britain steers his car during the first free practice at the Formula One Bahrain International Circuit in Sakhir, Bahrain, Friday, Dec. 4, 2020. The Bahrain Formula One Grand Prix will take place on Sunday. (Hamad Mohammed, Pool via AP)

Mercedes driver George Russell of Britain steers his car during the first free practice at the Formula One Bahrain International Circuit in Sakhir, Bahrain, Friday, Dec. 4, 2020. The Bahrain Formula One Grand Prix will take place on Sunday. (Hamad Mohammed, Pool via AP)

Williams driver George Russell of Britain in action during the first free practice during Formula One Bahrain Grand Prix in Sakhir, Bahrain, Friday, Dec. 4, 2020.(AP Photo/Kamran Jebreili, Pool)

Mercedes driver George Russell of Britain steers his car during the first free practice at the Formula One Bahrain International Circuit in Sakhir, Bahrain, Friday, Dec. 4, 2020. The Bahrain Formula One Grand Prix will take place on Sunday. (Hamad Mohammed, Pool via AP)

Mercedes driver George Russell of Britain steers his car during the first free practice at the Formula One Bahrain International Circuit in Sakhir, Bahrain, Friday, Dec. 4, 2020. The Bahrain Formula One Grand Prix will take place on Sunday. (Brynn Lennon, Pool via AP)

Mercedes driver George Russell of Britain steers his car during the first free practice at the Formula One Bahrain International Circuit in Sakhir, Bahrain, Friday, Dec. 4, 2020. The Bahrain Formula One Grand Prix will take place on Sunday. (Hamad Mohammed, Pool via AP)