The Brazilian Grand Prix: Can Red Bull and Ferrari disrupt Nico Rosberg's title ambitions?

But the Mercedes drivers won't have the track all to themselves as Red Bull and Ferrari have shown they have the potential to disrupt the title fight. Keith Collantine of Formula One blog F1 Fanatic sizes up what should be a tense race.

The pressure on the championship contenders continues to climb as we are just two races away from the end of the season. Nico Rosberg was powerless to stop Lewis Hamilton chipping into his lead with back-to-back wins in Austin and Mexico City, but as long as he keeps finishing runner-up to his team-mate that title will be his.

Rosberg is the form Mercedes driver in Brazil. In fact his record here against Hamilton is better than it is anywhere else: he's out-qualified his team-mate and beat him in the race every time they've raced at Interlagos as team-mates.

But Interlagos is also one of those venues which can throw up the unexpected. Violent rain storms appear at short notice. The track is tight and narrow, offering little escape from traffic. The densely-packed partisan crowd pushed up close to the track adds to a feverish atmosphere.

Spare a thought too for the less-heralded team members who are under just as much pressure as the drivers. Technical failures have played a major role in shaping this championship and one more could decide it.

There is a broad range of possible outcomes this weekend. If Rosberg wins the race he will clinch the championship. If Hamilton retires Rosberg only needs sixth place to secure the title. However if Rosberg retires a win for Hamilton give him a six-point lead ahead of the finale.

At the other end of the championship table Sauber have only two races left to avoid ending the season point-less. Marcus Ericsson's disappointment was plain at the end of the last race in Mexico where he produced an excellent drive for 11th, narrowly missing out on a point.

Team-mate Felipe Nasr will be desperate to impress in his second home race, particularly as his Brazilian backers are key to whether he stays in F1 next year.

Nasr will be the only Brazilian driver left in the sport's top flight next year as Felipe Massa will start his home race for the last time on Sunday ahead of his retirement at the end of the month.

Massa has great form at his home tracks with wins in 2006 and 2008, and a moral victory in 2007 when he sacrificed his lead so team-mate Kimi Raikkonen could win the race and the championship. Don't expect either of the Mercedes drivers to copy that one.