Sauber is predicting a return to form in the Japanese Grand Prix after its problems in Singapore last weekend.
The Hinwil-based team's C31 struggled for form at the Marina Bay circuit, but its strengths should be perfectly suited for the high-speed swoops of Suzuka.
That, allied to a raft of updates including a new front wing, has left its drivers optimistic about its chances.
Kamui Kobayashi said: "I'm very much looking forward to my home Grand Prix in Suzuka. I think our car should be very fast there and we also will get new parts on the C31 for the Japanese Grand Prix. I am confident about getting a good result in front of my fellow countrymen."
Sergio Perez added: "After underperforming in Singapore, in Japan I am expecting our car to again to be as good as it used to be and we should be strong in the high-speed corners."