"It feels fantastic. Of the two races we have finished we have been second and first so it is looking good and we are very optimistic," the Spaniard, who narrowly lost out to Red Bull's Sebastian Vettel for the world title last season.
"It was not easy to understand this race sometimes, not an easy race. The risk is there when you overtake.
"This is a good reward for the team after the disappointment in Malaysia."
In warm and dry conditions the race got off to a clean start.
But there was soon drama, as Sauber's Esteban Gutierrez slammed into the back of Adrian Sutil, of Force India.
Vettel, who started ninth on the grid, came fourth, 0.2 seconds behind third-placed Hamilton, while his Red Bull teammate Mark Webber failed to finish.
Aussie Webber broke the front wing of his Red Bull and damaged the car's rear right wheel after hitting Toro Rosso's Jean-Eric Vergne 17 laps into Sunday's 56-lap race.
Image: © Getty
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