Formula One world champion Lewis Hamilton is hoping his Mercedes team will be even more dominant this season even if he also wants rivals to give him more of a challenge.

I think 2014 was definitely one of the best, if not the best year of my career, the Briton told laureus.com recently.

Even though we were at the front of the field the majority of the time, the leader of the pack and ahead of others, it was still a challenge within us to try and improve all the time.

But we want to be better this year, we want to try and dominate even more.

Mercedes won both titles last year, with Hamilton winning 11 races and German team mate Nico Rosberg five of the 19.

Hamilton, who was fighting a bug in testing last week, said he felt very relaxed, fit and ready to race.

I will plan to drive as good as I did last year but I want to be better, he said.

I really like to race. Particularly with the challenge of other teams, because theres always strengths and weaknesses of another driver and another team so I love that. Thats what racings about, its to be racing with everyone, he added.

The more people the merrier ... if the cars are close you can have real races where youre overtaking and battling and thats what I love doing.

Hamilton, who is negotiating a new contract with Mercedes, is aiming for his third championship this year and reckoned he would have time to challenge for plenty more.

I think if Im lucky enough to be able to get to live out my whole Formula One career then - Ive just turned 30 - I think Ive got a good seven, eight years left in me, he said.