>> Nico Rosberg has stunned the Formula One world with a shock decision to retire. The announcement comes just days after the sportsman won his first World Championship with Mercedes, beating teammate Lewis Hamilton. In a statement on his Facebook page, the 31 year old wrote, I have climbed my mountain, I am on the peak, so this feels right.
Rosberg won nine of this season's 21 Grand Prix, beating three-time champion Hamilton by five points. Reuters Formula One correspondent Alan Baldwin says the time was right for Rosberg to go.>> I think he knew that this year was his big chance. It was his one chance probably and he won it.
I think next season he knew it was gonna be really tough. He's got a young family. His daughter was born last year. He's very much a family man and I think that why not go out on the top? He's the first champion since Alain Prost in 1993 to retire while champion.
>> The son of 1982 Formula One champion Keke, Rosberg made his debut in 2006. In his Facebook statement, he wrote, from the moment when the destiny of the title was in my own hands, the big pressure started and I began to think about ending my racing career if I became world champion.
Plenty of drivers would be keen to take his coveted position in one of the sport's top teams.>> Well, the big question is, who gets his job? And that's not an easy decision, because all of the top drivers are secure in teams.>> His Mercedes bosses certainly have a big seat to fill.