Lewis Hamilton is refusing to allow any negativity regarding Formula One's controversial double-points rule this season mire his positive thinking in his quest for the title.

From the nadir of Belgium, where Hamilton retired after being hit by Mercedes team-mate Nico Rosberg, the Briton has replied with a run of four straight victories, with the latest in Russia on Sunday.

A 29-point deficit at the end of the Spa race has been turned into a 17-point advantage, with a second championship firmly in his sights.

But the remarkable fact of this campaign is Hamilton could win the next two races - so opening up a cushion that in past years would guarantee him the title - yet still miss out on the crown.

The potential saving grace for Rosberg, who has won only four races to Hamilton's nine this season, are the double points on offer for the likely title-decider in Abu Dhabi on November 23.

It is a regulation introduced by F1 supremo Bernie Ecclestone at the end of last season that was immediately condemned by drivers and fans alike.

Yet the purpose for which it was designed by Ecclestone, to ensure a title fight could go all the way to the wire, looks set to come to fruition, which will almost certainly be to his delight.

Hamilton, though, has no intention of considering the possibility of any 'what if' scenarios such as punctures or technical failures.

"That (double points) highlights the decision that was taken for the last race, and whatever will be, will be," said Hamilton.

"For me, it's important not to put any negative energy or concern out there, and there's no need to be concerned because I've the utmost belief in this team and the car, and I'm in the best form of my life.

"Although you never know what lies ahead, you deal with it as it comes.

"There's no point thinking what if this happens or that happens, or what happens if he wins. There's no point thinking those things.

"I honestly think that's the wrong way to look at it. It's like looking at a glass that's either half empty or half full. That's just the wrong approach.

"Right now I've all the opportunities ahead of me, and I've just got to try and grab those.

"We've just got to do our due diligence and work as hard as we can to make sure we don't have any problems.

"It's about doing everything we can, maximising everything, and I plan to do that for these next three races, making sure I'm stronger than ever because I want to win."

Hamilton has become only the fourth driver in F1 history to win nine or more grands prix in a year, joining Michael Schumacher, Sebastian Vettel and Nigel Mansell.

The 29-year-old has also matched Mansell's British record of 31 wins, with the 1992 champion now urging his compatriot to go out and claim the mark for his own.

Via his Twitter feed, Mansell said: "Next race wishing Lewis the best of luck to make it 32 setting new records for the future. Congratulations keep it going."

Mercedes motorsport boss Toto Wolff, meanwhile, is to offer Hamilton a new contract at the end of the year in a bid to keep him at the team beyond 2015.

Hamilton's current three-year deal expires after next season, with speculation of late Fernando Alonso is attempting to engineer his way into Mercedes as replacement.

Wolff, though, has made it clear he has no intention of looking at any other driver other than Hamilton as partner to Rosberg for 2016 and beyond.

Wolff's remarks come in the wake of Mercedes clinching the first constructors' title in their history with a ninth one-two of the season at the Sochi Autodrom.

Wolff said: "We have a contract with both our drivers for 2015, and we want to continue with the current line-up.

"That is because these two boys are part of the success of the team, they know each other so well and they respect each other.

"The moment you get somebody else in, that fight could be detrimental to the team's performance.

"So our main priority is to continue with Lewis and Nico beyond 2015."