Williams development driver Susie Wolff says she is determined to prove herself after conducting her first test of the season with the team.
Wolff completed 55 laps of the Circuit de Barcelona-Catalunya on her way to setting the fifth fastest lap time.
The British driver says she has to prove that she deserves to be part of the sport, with her next test being the free practice session at her home race at Silverstone.
"It was a difficult start to the day with a different car to drive, you have to think a lot more about certain elements to get the best out on track," she said.
"It’s a learning curve, the team did a really good job getting me through the day and we got the most from the day which is important as I need to be ready for these free practice sessions.
"I have an opportunity this year and I have to prove myself. Today was good, but the free practice sessions are my next focus. It’s the dream of any driver to be on the driving grid but it’s tough to get onto the grid and I’m trying, but I’m one of those trying."
Wolff spun early on in the day and said she was simply caught out by the torque of the Mercedes engine.
"That was the torque, only my second run, shifting from third to fourth, shifted up and lost the rear," she said. "Pretty unspectacular but a tough lesson learned."
Wolff insists she is not bothered by the expectations of others.
"I don’t really worry what people expect as there’s some that expect me to be way off," she added.
"For me it's about doing a good job for the team – I didn’t even look at the lap times. The team had their own expectations of what I should achieve on each tyre set and that was my goal. Of course it’s nice not to be at the end [of the time sheets] but this is Formula 1 and it’s about getting the best performance out of me rather than comparing to the others.
"I have a lot of work ahead of me to get ready for the free practice sessions. I got good laps in today and time in the car helps as driving style is different in these cars."