Williams development driver Susie Wolff has said that she is not at the team to be part of a marketing scheme, after becoming the first female driver to take part in an official session in 22 years.
Wolff's debut run at Silverstone was truncated by a mechanical failure but her second outing at Hockenheim was more fruitful as she set a time just two-tenths of a second slower than Williams team-mate Felipe Massa.
"So many people said that this is just a marketing scheme," she told the Official F1 Website.
"But [team principal] Sir Frank Williams would never put someone in his car if he didn't believe that they are good enough. Frank came up to me after the sessions and said that he was really happy with my performance. Frank and [deputy team principal] Claire [Williams] - this is a racing team!
"So I know when I'm not good enough I'm out, because my performance counts more than my gender does. They gave me the chance and we can be proud that we have achieved something special together."
Wolff, who admitted that it would be difficult to secure a race seat for Williams, says it is now up to her to progress her career further.
"I have to fight for more - and hope that more is possible," she said.
"I am a great believer that if you keep knocking at doors then eventually one will open - and then I have to be ready for the opportunity when it comes. It was a big step forward to do a good job in the free practice sessions. Now it is for me to carry on and hope that other opportunities come."