Nico Rosberg claims the Mercedes' F1 engineers "could not see what was going on" during his disastrous start to Sunday's Chinese Grand Prix.
Teammate Lewis Hamilton eased to a third successive win in China, but still trails Rosberg by four points after the German's win Down Under.
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Rosberg recovered in Shanghai and has now registered a trio of runner-up finishes to the Briton, and at this early stage the title fight appears to be between the Mercedes duo as Mercedes.
No team in F1 history that has won the opening four races has then not had one of their drivers go on to be crowned champion.