Marcus Ericsson has admitted his next move could be out of Formula 1 and into Indycar.
The Swede has been signed up to stay at Sauber next year as reserve driver, but he is quoted by Brazil's Globo as indicating he also wants to keep racing.
Options aplenty
"We're also talking to teams in other categories. I see myself returning to F1 in the future, and in order to be able to, I want to continue to race in fast single seater cars. Indy is the best championship to do that," said the 28-year-old.
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He said Formula E is not a major consideration.
"It's definitely one of the options and interesting in many ways, but it may not be the best to stay in the type of racing as F1. Formula E is more of a career move.
"There are some better options to keep you on the radar to return here," said Ericsson.