Christian Klien insists he is ready to make an imminent return to the F1 grid, but doubts he is going to be needed at the forthcoming Italian grand prix.

It is reported that if BMW-Sauber agrees to release Robert Kubica to replace Ferrari's struggling Luca Badoer for Monza and beyond, third driver Klien would be asked to step into the vacated seat.

A Sauber source told Germany's Auto Motor und Sport: "Why should we let Robert go to Ferrari? In our situation we need the best drivers possible."

However, if Kubica were to switch, Ferrari might offer Hinwil based BMW-Sauber a supply of customer Ferrari V8 engines for next year.

"Rumours seem to be an integral part of F1 these days," Austrian Klien, who is conducting a straight-line aerodynamic test in the 2009 BMW car this week, said.

"I understand Robert Kubica has a contract with the BMW-Sauber team and I assume he will be driving our car for the rest of the season."

Klien insisted, however, that if there is a vacant cockpit to fill at Monza, "I am ready".


Klien 'ready' to replace Kubica if needed