Webber 'struggling' for pace

The Red Bull Racing driver could only be 17th quickest in the afternoon session, finishing nearly a whole second behind teammate David Coulthard.

"I've been struggling all day in the car," admitted Webber. "We've got work to do this evening; we just need to get our heads down now and see where we can improve before the qualifying tomorrow."

Coulthard also had a troubled day after his car caught fire on track due to a fuel leak that required the engine to be changed for the afternoon.

The Scot could only manage 12 laps but was still 11th fastest.

"My car had a fuel leak and fire at the end of this morning's session, so the team had to find the leak and change the engine," said Coulthard. "The boys did a great job to get the car out again when they did, as there was a lot of much work to do - it was a good effort.

"Originally we were going to use the T car for the second session, but I wanted to stay with the race car, so we changed the engine instead. Once the car was ready, we got on with working through our normal Friday practice."