Red Bull Racing team principal Christian Horner was upbeat about his car's progress during the first day of the Jerez test, hailing the new RB8's first day on track as 'positive'.

Williams chief operations engineer Mark Gillan is confident that the FW34 will complete a greater number of laps on Wednesday after its first day on track focused on systems checks related to its switch from Cosworth to Renault engines.

Mark Webber has come back stronger this season after struggling to match teammate Sebastian Vettel last year, according to Red Bull Racing team principal Christian Horner.

Mark Webber says Red Bull recovered well from losing the first three hours of running on the opening day of Formula 1 winter testing when parts were late arriving.

The organizers of this week's Rally Sweden have confirmed there will be international television coverage of the event.

Red Bull Racing's success last year gives no guarantees that its new RB8 challenger will set the pace this season, according to chief technical officer Adrian Newey.

Heikki Kovalainen is adamant the new Caterham CT01 is a clear step forward compared to last year's car.

Nick Heidfeld has revealed that he rejected other offers to race in sports cars this year before signing for Rebellion Racing.

Williams chief operations engineer Mark Gillan is confident that the team has now achieved technical stability after the upheaval of the past year.

The Caterham CT01 made its first appearance at Jerez on Tuesday, with Heikki Kovalainen taking to the track at the start of testing.