Feuding Red Bull drivers Mark Webber and Sebastian Vettel have put their bitter rivalry from last season behind them for the 2011 campaign.
"We're starting from zero. It's the same game, business as usual. He'll try to beat me and I'll try to beat him," said world champion Vettel at the final pre-season testing session here on Wednesday.
Vettel overtook Webber to take the world title in the final race last season with the Australian finishing third.
"Last year several times we had differing opinions. But we're not brothers, we don't have the same parents, so there is a strong chance we're not the same type of people. But even brothers sometimes can be very different," said Vettel.
Vettel set the fastest time in Wednesday's testing session, but remained cautious about his team's chances for the new season which gets underway in the Australian Grand Prix on March 27.
"It's still difficult to say. Sometimes depending on the configurations we're going 8 or 9 seconds slower," explained Vettel.
"For this reason it's difficult to read what the other teams are doing. But this year our car has behaved rather well in terms of reliability as much as speed.
"We know what we did in 2010 but that doesn't help us this year. We have a lot of things to resolve, new parts. That will keep us busy," said Vettel, adding: "We'll really see in Melbourne where we are."