Valtteri Bottas says Williams welcomes a double points finish in Australia but feels he wasn't able to extract the maximum around Albert Park.

The Finnish driver, who missed last year's race through injury, suffered more misfortune in Melbourne by losing out in the elimination qualifying format and also picked up a five-place grid penalty for a gearbox change.

Despite a less advantageous starting position on the eighth row of the grid Bottas battled through the pack to take eighth place in the middle of the tight midfield pack.

Bottas says he accepts picking up four championship points but is confident he could have challenged for more with a bit of fortune.

"It's good to get some points. Obviously starting from 16th place it's always tricky to move up, so it was good to get some points with both cars," Bottas said. "The grid penalty made it more difficult, of course, but step-by-step we managed to get closer to the top ten and, at the end, there was a small reward."

Having only just pitted before the red flag stoppage for the spectacular Fernando Alonso and Esteban Gutierrez crash, the Williams driver felt it also hampered his progress and ended the race stuck behind Nico Hulkenberg and Romain Grosjean.

"The red flag came at the wrong time for me as it was a shame I got stuck behind the Force India and the Haas," he explained. "I felt I had quite a bit more pace than them and maybe it would have been possible to score more points, but that's how it is.

"We got points with both cars and that's good but obviously 8th place is not satisfying, but points are points and they can be very important at the end of the season."