Sebastian Vettel dashed Mercedes' hopes of extending their spell of dominance into a fourth straight season by comfortably winning last month's season-opening round in Australia.
Hamilton was second ahead of new team-mate Valtteri Bottas. "It wasn't ours to lose," said Hamilton, who went into the Melbourne race as the favourite. "It was both of ours to win and they did a better job at the end of the day.
"For sure you can always go back in lots of scenarios and say if you'd done this differently you could win, but that’s hindsight,” said the Briton, who lost precious time bottled up behind Max Verstappen’s slower Red Bull after pitting early.
"...So we have to do a better job."
For his part, Vettel tipped Mercedes as favourites to win the Chinese Grand Prix.
His win at the Albert Park circuit ended a victory drought for Ferrari and the German stretching back to the Singapore Grand Prix in September 2015.
It also raised hopes the combination could emerge as genuine title challengers to Mercedes, who have swept the drivers and constructors' crowns for the last three years straight.
Read the full article on eurosport.co.uk: Hamiton: Mercedes must improve to beat Ferrari