Robert Doornbos is in talks with Toyota and Williams about returning to formula one in 2008 - but he is not interested in moving to the Spyker team.

That is the information of the Dutchman's manager Christian Geistdorfer, who is a legendary German rally driver.

Geistdorfer told the Dutch magazine Formule 1 Race Report that, given former Red Bull driver Doornbos' impressive results since switching to Champ Car in 2007, he has now opened talks with the aforementioned F1 teams.

He said he would like clarity about Doornbos' plans for 2008 by next month.

Ousted Toro Rosso driver Vitantonio Liuzzi, meanwhile - who will be replaced for 2008 by Sebastien Bourdais - vented his frustration by hitting out at the multiple Champ Car title winner.

According to Eurosport, Italian Liuzzi referred to Bourdais as "nothing special".

"In the tests he made with Toro Rosso he didn't turn impressive lap times," Liuzzi said. "He performed fairly well, but nothing special."