Nico Rosberg, the 2016 world champion, has sensationally announced that he has retired from Formula 1 with immediate effect.
The German driver won the title last week, beating Mercedes teammate Lewis Hamilton to his first drivers' championship.
Rosberg won nine of this season's 21 grands prix, beating three-time champion Hamilton by five points.
Rosberg has revealed he took the decision to quit, just 24 hours after sealing his maiden title.
Mercedes are yet to confirm the identity of Hamilton's 2017 team-mate.
Rosberg has been with Mercedes since 2010 and debuted in Formula 1 in 2006.