Lewis Hamilton says victory at the season-opening Australian Grand Prix was 'just one small step' in the defence of his Formula 1 crown and is aiming to continue the journey this weekend in Malaysia.

The two-time world champion fought off his Mercedes team-mate Nico Rosberg to take victory around Albert Park at round one and heads to the Sepang International Circuit looking for back-to-back wins in 2015.

"Australia was a great way to start. To pick up where we left off last year was awesome," Hamilton said. "But if 2014 showed anything, it's that putting together a whole season is never easy. Winning the first race is just one small step in a long journey and I'm not reading anything into it."

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The British driver says as soon as the chequered flag fell in Melbourne his thoughts immediately turned to Kuala Lumpur.

"The next step is Malaysia and that's all I've been focusing on since we left Melbourne," he explained. "I can't wait to get back out there and I can't wait to get to Sepang. The people are so welcoming and the support we had there as a team last year was amazing. Of course, the race itself is really tough with the heat and humidity."

Hamilton battled through the difficult conditions in Malaysia to claim victory at Sepang 12 months ago, marking his first victory around at the track in eight attempts. The win then sparked four consecutive first places to haul back his championship rival Rosberg after Hamilton failed to finish in Melbourne last year.

"I feel ready for anything right now and the aim is to repeat last year's performance," Hamilton said. "It took me eight attempts to win this race when I finally made it to the top step last year and I don't plan on waiting that long again."