The weather could have a big say on where the World Championship ends up this season as wet conditions are expected in Sao Paulo over the weekend.
McLaren's Lewis Hamilton and Ferrari's Felipe Massa will go head-to-head for the Drivers' Title on Sunday. Hamilton has the edge over local hero Massa as he takes a seven-point lead into the season finale.
Massa's task could be even tougher this weekend if the weather gods fail to play along. The Ferraris have struggled to make much of an impact during wet races while Hamilton relishes driving in the rain.
Showers are expected during qualifying on Saturday afternoon as well as during the race on Sunday and there are fears the demanding track could break down.
The FIA have already given Interlagos the green light, but tests have revealed that heavy rain could cause problems.
Race organisers therefore decided to make last-minute adjustments to the track and added grooves to parts of the surface to improve drainage.