Hopeful Heidfeld's manager 'cannot say anything'

Another day has passed without confirmation that Pedro de la Rosa has lost his Sauber race seat.

Evening reports after Sunday's Italian Grand Prix suggested Grand Prix veteran and current Pirelli tyre tester Nick Heidfeld will occupy the sister C29 alongside Kamui Kobayashi in Singapore and beyond.

De la Rosa and Peter Sauber have refused to comment.

And now German sources Die Welt newspaper and SID news agency quote Heidfeld's manager Andre Theuer as saying: "The only thing I can say is that I cannot say anything."

33-year-old Heidfeld, having attended the Monza event at the weekend, admitted that his new Pirelli role made him a sought-after figure in the paddock.

"I think it is obvious that this fact helps," said the German, who is the only driver to have tested next year's Pirelli tyres.

"It is no secret that I'm not doing these tests for money but in order to pave my way back into a cockpit for 2011. That (knowledge) should be an asset for many teams," added Heidfeld.