Felipe Massa insists he is not fazed by the latest round of criticism.
The Brazilian was often under fire as a Ferrari driver, but for 2014 he switched to Williams where he relished the chance to be a de-facto 'number 1'.
In Spain last weekend, however, Massa qualified ninth while his young teammate Valtteri Bottas made the headlines with his impressive run to fourth.
And in the race, the 33-year-old struggled even more, and he was lapped and out of the points as Finn Bottas, 24, finished fifth.
Once again, Massa is facing criticism, but he told Brazil's Totalrace: "I'm not the least bit worried.
"The focus is on the next race and doing a better job. I'm used to the pressure," he added.
He said the Grove based team is currently looking into why his tyre wear was much higher than expected in Barcelona.
"I think the only change was the temperature," said Massa. "With the colder track, something did not work for me."
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