Sauber team principal Monisha Kaltenborn is aware improvement is essential in 2015 after the team failed to pick up a point last season.
Team principal Monisha Kaltenborn has demanded an improvement from Sauber following the launch of their new car for 2015.
Last season's C33 was the first car produced by the Swiss team to fail to secure a point.
However, Sauber unveiled the C34 on Friday and expect an upturn in performance to follow.
"2014 was a very disappointing year. However, this is in the past, and we now focus on what comes next," said Kaltenborn.
"We have learned our lessons and are confident for the new season.
"We have to improve, and be able to fight for championship points."
Sauber will have an inexperienced driver line-up in 2015, with Marcus Ericsson - who drove for Caterham last year - paired with rookie Felipe Nasr.
"I am delighted about our two new drivers who bring a breath of fresh air," Kaltenborn added.
"Both are young, talented and highly motivated. On their way to Formula 1 both stood out through victories in Formula BMW and Formula 3. Both then finished this career progression off in the GP2-Series.
"While Marcus looks back to one season in Formula 1, Felipe will have his rookie year in which he comes fully prepared due to his role as test and reserve driver at Williams last year. I feel confident with regard to our drivers."