Sauber is "feeling quite positive" about its chances to score points in the Singapore Grand Prix after two tough races.

The deficit of the Ferrari power unit was prominent at both Spa and Monza as Sauber again failed to score, with the team currently sitting below Marussia in the constructors' championship. However, with updates set to be delivered in Singapore, head of track engineering Giampaolo Dall'Ara is confident the Marina Bay circuit will see an upturn in form.

"Considering that the Singapore track is one of those circuits which are less dependent on engine power, as well as the fact that we will be introducing an aerodynamic update package with a new engine cover and a modified front wing, the team is feeling quite positive about regrouping in Singapore," Dall'Ara said.

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"The night race on the street circuit is one of a kind; the track offers the typical engineering challenges of a street circuit with the need for mechanical grip, traction, stability and cooling on top of the job list. To the drivers it is unforgiving in places, it is therefore essential to provide them with a set-up they can fully trust. The show will benefit from Pirelli's compound choice of soft and supersoft, and the safety car deployment rate of 100 percent in the races so far."

And Esteban Gutierrez agreed that he expects to see a more competitive Sauber next weekend, especially following recent work on the mechanical grip the car provides.

"In terms of track layout, I think the characteristics will suit the C33," Gutierrez said. "We have been working intensely on the mechanical set-up of the car, which will be crucial on this circuit, as the track has many tight corners and only a few short straights.

"I am really looking forward to the weekend, and especially to getting the maximum out of the updates to the car we are having there. It is going to be an interesting race, and there is a realistic chance for a positive result."