The F1 circus left the Interlagos track late on Friday expecting bad weather on Saturday, and those who then attended the open-air Eminem concert got very wet.With Red Bull apparently dominant in the dry, the team's championship rivals were looking forward to Saturday's likely inclement conditions."Yes, we need rain," confirmed McLaren's Lewis Hamilton. "In terms of pure pace in the dry we can't really compete with the Red Bulls."His teammate Jenson Button added: "I think they are not as strong in the wet as they are in the dry."Michael Schumacher told Germany's Auto Motor und Sport that he is not worried about the forecast, despite aquaplaning and drainage proving a problem at Interlagos in the past."You have to say that the track has improved significantly," he said.Indeed, Interlagos has improved its drainage since last year's qualifying washout, with 'grooves' having been cut into the track surface to better direct the water flow."It's always a bit of a lottery when it rains, and not really welcome if you're fighting for the championship," said Schumacher.