On 30 November 2020, a day after winning the Bahrain Grand Prix, Drivers' Champion Lewis Hamilton announced that he had tested positive for COVID-19, claiming to have been experiencing "mild symptoms". During the week leading to the race, he underwent three tests, but all returned negative. Mercedes confirmed that Hamilton would miss the Sakhir Grand Prix in Bahrain later that week as a result.[38] He was replaced by George Russell from Williams who was in turn replaced by Jack Aitken.