Sauber baffled by constant driver rumours

Peter Sauber has denied recent rumours and reports suggesting the seats of his Swiss team's drivers are in doubt.

With Pedro de la Rosa and Kamui Kobayashi failing to score a single point so far in 2010, it was rumoured Sauber could replace them with drivers who at least bring sponsorship to the mostly blank-liveried car.

But team founder and boss Sauber, 66, is quoted in Monaco by the EFE news agency: "I do not understand why this (claim) is repeated again and again.

"The Spanish Grand Prix was the first time we were able to give the drivers a competitive car, which is very important for their confidence."

After a dismal start to the season, the Swiss believes Sauber's fortunes are now beginning to turn.

"I think that in Spain we made significant progress and took two steps forward; something that was necessary," he said.

Sauber also revealed that, after several steps of development, the C29's F-duct system is now "working well".