Williams number one driver Nico Rosberg is expecting to be able to put in another good performance at the Belgian Grand Prix this weekend and he still believes a podium finish will come soon.

Rosberg scored points yet again last Sunday in Valencia and after bringing his Toyota-powered Williams home in fifth increased his tally for the year to 29.5 points - something that currently puts him in P5 in the drivers' championship, 2.5 points up on McLaren's Lewis Hamilton.

Speaking prior to the twelfth round in the 2009 FIA F1 World Championship, Rosberg added that he has been impressed with how the Grove-based squad has developed the FW31 this year.

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"It was a good weekend for us in Valencia," Rosberg said. "Again, the car performed really well which is good to see. It's been consistent on every single track so far so I'm pleased with the way the team is working.

"In relation to other teams, we've done well on the development front as well. We should have been on the podium, but McLaren have made an even bigger jump than us which is frustrating, but we are always there and a podium should come soon.

"Hopefully [my team-mate] Kazuki [Nakajima] will have some more good fortune on his side for the rest of the season too as he was very quick last weekend and he could have scored some points if it weren't for the puncture.

"Now we go straight to Spa and it should be good for the team. It's a very high speed track, very different to Valencia, but our car goes really well everywhere. This track, in particular, will suit our car because we have a strong aero package for the quick corners so I'm looking forward to it."

Kazuki Nakajima meanwhile agrees that Spa should be a good event for Williams and like Rosberg will be gunning for points, something he has yet to manage in '09.

"From Saturday on, it was a bad weekend for me in Valencia," Nakajima added. "We had a problem with the car in qualifying which ruled me out of Q2 and put me right down the grid in P17. From there, it was hard work to make any headway even though I made up three places in the opening lap.

"I was running in 13th and racing for 11th when I then had a puncture which was really frustrating. Up until then, it was going quite well considering so the end result was a real shame.

"Spa is very different to Valencia though with its medium and high speed corners. We struggled a bit there in 2008 but this year's car is competitive everywhere so it should be fine. The weather made it a difficult race last year so hopefully it will be more stable this weekend.

"I don't have much experience of Belgium as a whole, but Spa and the surrounding countryside is really beautiful.

"It's quiet, but the people are really passionate about F1 so it is always really nice to go there," he summed-up.