Following the McLaren-Honda split, it is expected the Spaniard will stay at the newly Renault-powered British team next year.
But Alonso’s self-imposed September contract deadline has long expired.
Spain’s El Mundo Deportivo quotes him as saying: “There is still no decision. So we’ll see.
“I continue to have all the options open.”
The newspaper said Alonso, who did the Indy 500 this year and has been linked with both Le Mans and the Daytona 24 hour race for 2018, is talking about “other categories” still being an option.