Nico Rosberg says the disappointment of last year's failure is acting as his main motivation for the 2015 Formula 1 championship, which begins this weekend with the Australian Grand Prix.

The German driver finished runner-up to team-mate Lewis Hamilton in 2014, pushing him all the way to the final race of the year before eventually conceding the title when his Mercedes car failed him in Abu Dhabi. Re-energised and re-motivated for the season ahead, Rosberg only has eyes on a maiden Formula 1 world title.

"It comes down to who can put the best season together overall and I have to make sure it's the other way around this time," Rosberg explained. "My team-mate is just one of many strong competitors who I have to beat if I want to be World Champion, so I'm just focused on being the absolute best I can be.

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"I now know the feeling of winning races and I intend to do a lot more of that - but I also know the feeling of not winning in the end and I don't intend to repeat that experience. It's a huge motivation for me and gives me even more determination for 2015."

The Mercedes driver enjoyed a thoroughly impressive winter testing programme and is once again a hot favourite for the Formula 1 title along with defending champion Hamilton. Rosberg's 2014 challenge got off to the perfect start last year when he won in Melbourne after his team-mate suffered power unit issues from pole position.

Hamilton was forced to retire from the Grand Prix after two laps, enabling Rosberg to claim victory and, at the time, just his fourth Formula 1 career win. Now with eight career victories, the 29-year-old is hungry for more.

"2014 was a really incredible season for the team and I know everyone is pushing harder than ever to do it all again. Seeing everyone at the factory is a big motivation for me. This will be my sixth year with the team and we're getting stronger with every season. It's great to have a group of people working alongside you who are as passionate and driven as you are.

"It's up to us drivers to repay them for all their efforts and I'm determined to do them proud. We had a good winter but it's never straightforward. You always have challenges to overcome and there's nothing for certain, so we have to keep pushing. Personally, I have focussed on pushing myself even harder for the rematch with Lewis."