Esteban Gutierrez and Adrian Sutil admit the pressure is mounting for them to score points for Sauber and take ninth in the constructors' championship.

Sauber is currently sitting in tenth place having yet to score a point this season, with Marussia ahead of it on two points. Marussia won't race in either Austin or Brazil after going in to administration earlier in the week and Gutierrez admits the pressure is mounting to score in the final three races.

Asked at the COTA Fan Forum - streamed live on Crash.net - if the financial pressure is having an affect his racing, Gutierrez replied: "Yes it is, it's a reality and you cannot hide it.

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"It's something that's been there. We've been having a lot of reliability issues in the car and we've been in a position to score points quite a lot of times and every time there is something going wrong in the car and it's been putting a lot of pressure on the team and on myself as well to be very precise everywhere to get those opportunities again."

And team-mate Sutil admits the main focus for the team has to be ensuring it has no regrets between now and the end of the season.

"There is always pressure," Sutil said. "At the same time, if you just drive because you like it and I have my goal because I want to make it better anyway, it's OK. Every race I want to deliver the best I can and I put myself under pressure the most so I don't really see it any different.

"As a whole team it's kind of getting closer to this deadline where we say 'Now we really need it'. But life goes on and if we don't achieve it then we have to do it next time. What is most important is to not make a mistake and to make the best out of it. Then we can say at the end of the weekend that we have done everything, we achieved only finished 11th or 12th but we couldn't do better. Then we can all go to sleep and sleep well, I think."