Brazilian GP: Williams Friday quotes

Bruno Senna - 13th: "It was quite a tough session today as we didn't get as much information as we would have liked for tomorrow. We've got some work to do to understand how we can do things better to make sure we're competitive for tomorrow, as the grid is very close here. It's very hot today but it was great to see all my home fans out there, even with sweat in my eyes!"

Valtteri Bottas - 14th: "Today were predominantly doing some tests for next year which mainly involved doing short runs just to gather data. It was interesting to feel the difference on the new 2013 tyres and we will now go away and analyse the data from FP1. The last run was slightly busy with traffic but it's great to experience this track for the first time as it was really enjoyable to drive."

Mark Gillan, Chief Operations Engineer: "We completed a very busy FP1 programme in the morning testing the 2013 prototype tyres and some development items. With the very high track temperatures and track evolution it was difficult to find a decent balance, especially in FP2. The weather still looks like it will play a big part in the race on Sunday so we need to keep the changeable weather conditions in mind as we prepare for tomorrow's qualifying."