Sauber to test revised F-duct

The Swiss-based outfit was the first to adopt the McLaren-pioneered system in Australia, which helps stall the rear wing on the straights for a top-speed advantage when the driver closes off a vent in the cockpit.

Although the team only ran it in first practice in Melbourne, it is hoped that revisions made to it for Sepang has left it close to being given the green light to stay on the car for the whole weekend.

Pedro de la Rosa said: "We will run it tomorrow, to continue the testing. It is a modified version and we are trying to get on top of it.

"It is not an easy system to make it work and they have been working very hard in Hinwil to get some modifications in time - and we will see tomorrow.

"We will react accordingly. If it works, fine. If it doesn't we will wait for another grand prix. But we are pushing 100 per cent on this."

De la Rosa believes the Sauber C29 should be more competitive in Malaysia than it has been in the first two races of the season - especially after a damaged floor hindered his pace and cost him points in Australia.

"I think that the result was disappointing," he said. "We should have been able to score some points, but having said that, for us to score points is going to be very difficult at the moment.

"We are in that position where we are just outside the top 10, so it is very difficult for us to make the next step, and that is why Australia was a missed opportunity. We did everything right, we did a good start, we kept out of trouble, we were running quite high up there and unfortunately it didn't work out. Now we come here, it is a different track but should us a little bit better."