Felipe Nasr felt it was a case of job well done on the final day of in-season Formula 1 testing in Austria and hopes the data he's collected will provide Sauber with valuable gains later in the season.

The Brazilian driver banged in 138 laps on the second day of the test and says it was a thoroughly productive day for the team as they worked on aerodynamic data, brakes, tyres and race setup for Silverstone.

Despite feeling satisfied with his day's work Nasr ended it bottom of the timesheet with a fastest lap of 1m 10.922s, 1.8s of quickest driver Nico Rosberg.

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"I am quite satisfied. Today was very productive, as we went through the planned programme," Nasr said. "We were able to go through a job list of things that could not be done during a race weekend.

"We completed some useful work after the lunch break, as we worked on the brakes. In the end we completed over a hundred laps. We will now analyse the large quantity of data and information we gathered to further improve our performance."