Rubens Barrichello has fuelled speculation regarding a possible return to Formula 1 in 2014 by stating that he will take an opportunity if one is presented to him.
The 41-year-old, who left F1 in 2011, has been heavily tipped to sign for Sauber.
Responding to the rumours, the Brazilian tweeted: "Lot's of things have being said this week about a possible F1 return. The truth is: 'if there is an opportunity, I'm in'."
Since leaving F1, he has raced in the IndyCar Series and has taken part in the Stock Car Brasil championships.