Lewis Hamilton: Mercedes team-mate Rosberg is my main rival

Lewis Hamilton believes Mercedes team-mate Nico Rosberg will be his "biggest rival" this season.

The 29-year-old says he could "never have dreamed" his switch from McLaren could have gone so well and feels he has "matured a little" since joining the silver arrows.

The 2008 world champion won the Malaysian GP, converting his pole position into a comfortable win.

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