Williams test driver Susie Wolff believes Sebastian Vettel's small stature proves women could compete with men in Formula 1.

Susie, wife of Mercedes Director Toto Wolff, has competed in junior open wheel categories as well as Germany's DTM championship before making the move up to reserve driver.

Wolff is now applying for a super licence, mandatory for all F1 drivers to compete in a race, and it is believed Wolff will try and become the first women to take part in a race in two decades.

Many believe the biggest obstacle preventing females from participating in F1 is a lack of muscle however, Wolff pointed at Vettel as an example that isn't true.

Wolff told the Observer: "Look at the size of Sebastian Vettel. Do you see a big, muscular guy?

"I know women have 30% less muscle than men. And in DTM I had to train harder.

"But I was karting from such a young age that, year on year, my body was getting stronger in the right places."

Meanwhile Vettel has spoken about the possibility having Kimi Raikkonen as a team-mate next season describing the possibility as "unrealistic".

The future of Vettel's current team-mate Mark Webber was thrown into doubt after the pair fell-out in the wake of 'Multi-21' affair at the Malaysian Grand Prix.

Speculation has linked Raikkonen to Webber's seat next year and both the Finn and Vettel are known to have a good friendship.

"I do get on very well with him," Vettel told Welt am Sonntag newspaper.

"We see each other at the races if time permits, as we are both straightforward, honest -- we do get on well together," he said.

However, Vettel did say that their friendship was "exaggerated."

"But you don't find your real friends in Formula 1," he added.

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