Susie Wolff has blasted critics who labelled her a Williams "marketing scheme" because she is a woman.
The 31-year-old took part in practice sessions at the British and German Grands Prixs, becoming the first female to do so in 22 years and Wolff has stressed that she is with the right team.
She told the F1 official website: "So many people said that this is just a marketing scheme, but 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.
"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 is not scheduled to drive for Williams again this season.