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Kamui Kobayashi admits he's has a few concerns about the notorious ever-changing weather as he gears up for the Belgian GP.
Although the Japanese driver has some experience of the Spa-Francorchamps circuit, having raced there in Formula Renault and GP2, this weekend's race will be his first in Belgium as a Formula One driver.
And with Sauber's performances on the rise, Kobayashi is hoping for a solid weekend and a few more points. However, he's worried that the weather could cause chaos.
"I am quite sure our car will be good in these fast corners," he said. "Perhaps it won't be so good on the straight, but let's wait and see how it goes when we all get back refreshed after the summer break.
"What always worries me a bit is the weather in Spa. It can be very unpredictable and include heavy rain in some parts of the circuit, while it is dry in others."
Meanwhile, tech director James Key believes Sauber can look forward to further improvements this weekend, although that could depend on how the team copes with the weather.
"It will be good to go back to Spa and we are looking forward to racing on this unique circuit, which is always a big favourite with the drivers. The track layout is obviously very different from the circuits we have recently raced on," said Key.
"For the first time since the Canadian Grand Prix in June, we will be returning to a lower drag configuration for the car. Certainly we want to continue with the recent form we have shown, and the package for Spa is based around the ongoing developments we have introduced since Valencia.
"We will need to leave our options open as regards car setup and downforce levels to find the best possible compromise for the fast sectors one and three, where you benefit from low drag, and sector two, which favours a higher downforce level.
"As always in Spa, you need to be flexible and take the unpredictable weather conditions into account. We are very much looking forward to an exciting Belgian Grand Prix and the restart of the season after the summer break."
