Susie Wolff says it is important for her to perform each time she steps into the Williams as she '100 per cent feels a woman can compete' in Formula 1.

The Scot completed her third career FP1 session with the Williams Martini team in preparation for the Spanish Grand Prix, the first time she has driven the FW37 since the winter testing.

Completing 22 laps en route to 14th fastest overall, almost on par with fellow FP1 drivers Jolyon Palmer at Lotus and Raffaele Marciello at Sauber, Wolff was also less than a second slower than experienced team-mate Felipe Massa.

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Indeed, Wolff was pleased with her performance, but she says it is crucial for her to do the best she can during her limited appearances so as to prove she and other women are capable of competing at such a level.

"I always knew it was about performing every time in the car, because ultimately that's all you can do to help your position in this paddock," he said. "My goal was to get as close to Felipe as I could because he is in the same car as me, but I am focused on doing a good job in the car and I wouldn't be doing this if I didn't feel I was good enough.

"I am ambitious, but I am also realistic. If I didn't think I was good enough or capable of racing at this level, I would have been the first to take myself out of the game.

"I feel like I am very close, I feel like I have something to bring to the table and I 100 per cent feel that a woman can compete at this level and that is why it is so important for me that every time I am in the car to perform.

"I know what I am capable of and what to show that to the best it can be, because I do believe it is manageable."

Wolff will get more time in the car during the post-season test and again after the Austrian Grand Prix, before returning for FP1 at Silverstone.