Sep.24 (GMM) According to rumours in the Singapore paddock, the Toro Rosso and Sauber teams could be set for new ownership.

The Basler Zeitung newspaper claims Nick Heidfeld's new tenure at Sauber could be short-lived because Mexican GP2 driver Sergio Perez stands a good chance of becoming Kamui Kobayashi's 2011 teammate.

The rumours linking the Swiss team with Mexican billionaire Carlos Slim, who sponsors Perez through his Telmex company, have been circulating for some time.

Sauber has already signed a Mexican, the teenaged Esteban Gutierrez, as its 2011 reserve driver.

Meanwhile, the Swiss newspaper Le Matin reports that Dietrich Mateschitz wants to sell Red Bull's second formula one team Toro Rosso.

The report said the Austrian billionaire stands to make a handsome profit from the deal, because after buying Minardi for $40 million in 2006, the Faenza based team is now be worth three times that much.

Jacques Villeneuve/Durango was mentioned as a possible buyer.

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