Felipe Nasr will work with a new engineer for the remainder of the 2015 Formula 1 World Championship season after a 'mutual agreement' to part ways with Craig Gardiner.

The Brazilian has been working with Gardiner since making his F1 debut with Sauber earlier this year, but differences of opinion behind the scenes have prompted a reshuffle in the team, with Paul Russell taking on his duties.

Nasr has already agreed a new deal with Sauber for the 2016 season, with Russell - who has worked with Pedro de la Rosa in the past - set to stay on board.

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"Paul has been on the team for a long time and I worked with him in the pre-season tests in Jerez and Barcelona, and also after the Austrian GP. He's a guy with whom I have a good relationship and for knows the team. I think he will be a good news. He worked with Pedro de la Rosa for a while, I think in 2009 and 2010, and our goal is to work as well as possible to score the maximum possible points.

This change was a mutual decision. We decided this together - myself and the team, and the important thing is that our goal is the same. Paul assumes this role from this weekend to help the team as much as possible."

After grabbing the headlines on his debut with a run to fifth place in Australia, Nasr has cracked the top ten on just three further occasions, even if he remains classified ahead of Pastor Maldonado, Carlos Sainz and team-mate Marcus Ericsson.