Felipe Nasr is hoping the much anticipated update to his Sauber's Ferrari engine will see him challenging further up the grid in the Belgian Grand Prix.

Openly admitting to completing the first-half of the 2015 season with a car no different to the one he started the year with, Nasr had been pinning his forthcoming hopes on the upgrade coming to his Ferrari engine from Spa onwards.

Bringing the team back into line with Ferrari, which has had use of the upgrade since Canada, Nasr is hoping the changes will benefit Sauber and prevent it from slipping beyond seventh in the constructors' standings having run as high as fifth earlier in the year.

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"We do have our engine update there, but, as we haven't run it yet, we don't know what it is going to be like. We are all looking forward to it and hope this will be a benefit for us.

"Spa is my favourite circuit on the calendar. The track is unique, having a lot of high-speed corners and a great corner combination. As a driver you get a nice flow going through these corner combinations. It is a track on which you need a stable car in the high-speed corners.

"I would say the combination of low downforce and traction is essential to be competitive. Going through Eau Rouge flat out will be tricky and, for sure, a challenge. It will be my first time driving this circuit in a Formula One car."