Flavio Briatore does not believe Red Bull will struggle in 2013. There have been reports the reigning world champions had a difficult final test with the new RB9, struggling with the latest upgrades...

Flavio Briatore does not believe Red Bull will struggle in 2013.

There have been reports the reigning world champions had a difficult final test with the new RB9, struggling with the latest upgrades and finding a good setup.

But former Renault chief Briatore, who still manages Mark Webber, said: "Webber tells me he will start very strongly.

"He said the tests have been fruitful and that the machine is very good," he told Italy's La Gazzetta dello Sport.