Brazil GP, Sao Paulo - Sunday, 1800 BST
Fernando Alonso admits there is no room for error as he seeks to secure a second straight F1 title in Brazil.
Alonso has the title within his grasp again
An eighth-place finish on Sunday would be enough to retain his crown even if Ferrari rival Michael Schumacher wins.
But the Renault driver said: "Last year I had three chances - here, China and Japan. This year I have just this race, so I cannot lose this opportunity.
"The dream is close to being realised again, but when you have a chance to be a champion there's always pressure."
Already the youngest driver to win the title, Alonso, 25, is just a point away from joining an elite group who have clinched back-to-back championships.
People remember who is champion and the car he drove, but not who was the constructors' champion 10 years ago
Michael Schumacher, Ayrton Senna, Alain Prost, Mika Hakkinen, Jack Brabham, Juan Manuel Fangio and Alberto Ascari previously achieved the feat.
The Spaniard said: "After the last result in Japan, we're in a good position, and now we have to do our best to complete the final part of the job.
"It requires maximum concentration. I'm ready for this last battle and I think the team is ready - no mistakes this weekend."
Renault can also clinch another constructors' title as they lead Ferrari by nine points, requiring just 10 for glory in the final race of 2006.
But Alonso, who joins McLaren next year, added: "To be honest, the most important thing for me is the drivers' championship - not only for me.
"People remember who is champion and the car he drove, but I don't think anyone remembers who was the constructors' champion 10 years ago.
"For sure it's important, but I think the team and myself know which is more important."