Brazil Friday quotes: Force India

Tonio Liuzzi - 16th: "With this unpredictable weather it's important to be out at exactly the right time to get the best of the track so perhaps the final classifications are not truly representative of the real order right now. We still have to work on the balance as it is not 100% just yet but overall the car is responding well to all the changes we have made. Unfortunately we just got caught in traffic every time we tried to do a good lap time but I'm happy we are going in the right direction for tomorrow. I think we could be in for a good qualifying, particularly if the weather stays so uncertain or if it rains some more as we have been pretty competitive in these types of conditions so far this year."

Dominic Harlow, chief race engineer: "A couple of periods of light rain during the practice sessions today meant that our programmes were adjusted slightly to get a proper look at the tyres. It seems to be quite a standard set-up with the medium and super soft, and the car balance is not too far away. It's very close through the field, I've never seen so many positions decided on thousandths, not even hundredths of a second. Qualifying will be about traffic management and timing and it looks like the weather could also play a part."