Marcus Ericsson rues some missed opportunities from the first half of 2015 but says he is "satisfied" with how he has adapted to life at Sauber.
Ericsson joined Sauber from the now-defunct Caterham outfit last season and scored his first F1 points by finishing eighth at the Australian Grand Prix. However, in that race team-mate Felipe Nasr finished fifth and the Brazilian goes into the summer break with 10 more points than Ericsson.
Sauber has dropped off the pace after its strong start to the season but Ericsson says the team has "done a good job" after a pointless 2014 campaign.
"I think it's been a decent season so far, keeping in mind the team's performance in 2014," Ericsson said. "We had a good season-opener, finishing with both cars in the points. Obviously, in the last few races we were all a bit disappointed as we lost momentum. Overall, we have done a good job so far, but, of course, we want to score more points. For myself I think I have learned a lot."
However, Ericsson feels he could have had some stronger results this season.
"Coming to a more experienced team was a big step up for me. I am satisfied with my performance so far, but there are some missed opportunities that I regret. That's how it is sometimes, but I learn from these moments. There is always room for improvement, and I will push to become better."