Jenson Button says there is "no reason to want to change" his career path despite not yet having an F1 contract for 2015.

Now in his fifth season with McLaren, Button's future is uncertain as his contract expires at the end of the year. Despite McLaren having yet to sign new deals with either of its drivers, Button - who is the most experienced driver on the grid - said he isn't contemplating anything other than a future in F1.

"Right now my interest is to race in Formula One," Button said. "You have tough days and it hurts like hell because I want to be competitive and I want to be fighting but then you have a reasonable qualifying and you're back on track and want to race forever.

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"Formula One, the emotions are all over the place, they really are. It's highs, it's lows; there's never anything in the middle. I've lived my life like that for a long time and I want to continue living my life like that - hopefully with more highs than lows - but I'm young, I'm fit and I'm enjoying what I do for a living so there's definitely no reason to want to change."

McLaren racing director Eric Boullier has previously said that the team is "not in a rush" to decide its future driver line-up.