"We're working on it for sure, but it's not secure yet, so I think we will have a decision or an announcement to be made after the Brazilian Grand Prix. But so far it's business as usual here on the track and focusing on [securing] the best result of the season so far."
Regarding a switch to a rival team, the former HRT and Renault driver said he and his management's focus was on ensuring he was in a competitive seat for 2013, although stressed that for this weekend his mind was purely on racing matters.
"It's difficult to know [what will happen]," he told Sky Sports News
, "It's not defined yet and we are pushing very hard to make sure that I have a competitive seat for next year. But, at the end of the day, it's important to keep the right focus for this weekend, push on the competitive side and worry about the [future] races a bit later on."