Fernando Alonso says he has not signed with McLaren for next season and remains undecided about his future in Formula One.
The two-time world champion is still "considering what's the best decision'' for his career and "nothing has been decided'' so far even though he already has "an idea'' of what he wants to do.
Alonso's contract with Ferrari ends at the end of year. He has been with the Italian team since 2010.
The 33-year-old Spaniard is sixth in the drivers' standings this season, 167 points behind leader Lewis Hamilton.
Meanwhile, Hamilton can set more British Formula One records in Brazil this weekend but it is the world championship he wants and that will have to wait.
No Briton has ever won six grands prix in a row, or celebrated 11 victories in a single season.
The Mercedes driver, who has already overtaken 1992 champion Nigel Mansell as his country's most successful in terms of race wins after chalking up his 32nd in Texas last weekend, can do both at Interlagos.
"I guess I have a buffer for the next race, if something goes wrong you still have an opportunity to be in the fight but that doesn't really change my mentality or approach," he told reporters in Austin. "I've never won in Brazil. I nearly won in 2012 but was taken out.
"It is what it is," he said of the double points. "There's no point in getting upset about it. It's just about being positive. I've driven the best I've ever driven this year."