The Briton, who is chasing a third successive victory in Shanghai, denies his Mercedes teammate has struck a psychological blow by winning the first two races, insisting the early skirmishes count for little with 19 grands prix left in a championship with more rounds than ever.
But Hamilton has failed to win since securing his third world championship in Texas last October, while German rival Rosberg, who has opened up a 17-point lead over his fierce rival, has now won the past five races dating back to last year.
"I couldn't care less if he's won the last five," sniffed Hamilton, who was rammed by the Williams of Valtteri Bottas at the first corner before finishing third behind Kimi Raikkonen's Ferrari in Bahrain two weeks ago, despite starting on pole for the second race in a row.
"Anything can happen."
The 31-year-old knows, however, that failure to stop the rot in China could add weight to suggestions that he has lost a little of his edge since winning his third world title, a success he celebrated by partying long and hard.
Hamilton is still searching for the swashbuckling form that swept him to victory last year when he dominated in Shanghai, prompting a tantrum from Rosberg.
Worryingly also, Mercedes boss Toto Wolff has warned that the clutch problems that have sabotaged Hamilton's starts, setting him back in the first two races, might not be fixed in time for China.
