Daniel Ricciardo is not ruling out a move to Ferrari at some point in the near future.
Rumours in 2015 and again this year have linked the Australian with Maranello, but Red Bull are believed to have secured him for at least the next two years.
Ricciardo, 26, has told Germany's Auto Bild that he is determined to push his career forwards.
"I'm very uneasy when I think of Sebastian [Vettel]," he said, referring to his 2014 teammate.
"He is only two years older than me, but he already has four titles. The form I'm in, I expect in the next 12 to 18 months to have a car to fight him for the title."
As for Ferrari, he said: "When they start to dominate Formula 1, it would be very nice to win a title with them.
"But my first goal is to do it with Red Bull. Regarding the rumours, no - at the moment there is no contact [with Ferrari]."
Ricciardo sits fifth in the table ahead of this weekend's Austrian Grand Prix.
