Mercedes driver Nico Rosberg is adamant that the title fight is not yet over, despite team-mate Lewis Hamilton holding a 48 point advantage with only five rounds remaining.
Hamilton and Rosberg fought for the 2014 title until the final race in Abu Dhabi but this year the Briton has pulled clear and could wrap up a third crown as soon as the Mexican Grand Prix.
Heading to this weekend's Russian Grand Prix, Rosberg insists that Hamilton has not yet won this year's title.
"I'm not backing down in my fight for the championship and gaining those positions back fair and square showed that," Rosberg said, referring to his recovery from fourth to second in Japan.
"We have five races to go and, although the championship gap to Lewis is quite big, in my mind it's definitely not over yet.
"The way the whole team has performed this year - from the factories to the garage - has been just incredible and I have the car I need to get back to the top step.
"I really enjoyed our first trip to Russia last year and it was an awesome weekend for the team - one that I will always remember after seeing all the hard work they've put in during my time here.
"So, I'm aiming to put all those tools they've given me to good use and bring home a top result."