Motorcycle racing legend Giacomo Agostini has questioned Nico Rosberg's decision to retire.
The Italian, who competed in non-championship Formula One races following a massively successful two-wheeled career, told La Gazzetta dello Sport that he can't understand the German's decision to quite mere days after winning his first world championship.
"I don't understand it," Agostini, 74, admitted.
"I wonder if he had a great passion or just wanted to win a title. It takes some courage to give up many millions, but I also think of (footballer Francesco) Totti who is 40 and not stopping.
"When I retired, I cried for three days," he added.
"Nico did a little of what (Casey) Stoner did, when you see someone who has the gift to be a Michaelangelo and throws it away," said Agostini.
Meanwhile, Rosberg has said he can't understand why people feel the need to criticise his decision.
"People who criticise? I say let everyone choose their own way, Rosberg told the French language AFP news agency. "From my point of view, I had a very nice time, I got what I wanted, I succeeded. Now I have much to look forward to, like spending more time with my daughter," he added.
Bahrain International Circuit - Winter testing