Circuit: Autodromo do Algarve, Portugal.4.686km
Objective: Initial systems, performance and reliability checks with the FW31.
Weather: Rain early morning, clearing mid-morning and dry for the rest of the day.
Average ambient temperature: 11C
Sam Michael, Technical Director, Williams F1:
"We had a wet track for the first couple of hours in Portimão today, but by late morning it had dried out enabling us to run slick tyres on the FW31 for the first time. It was a constructive day as we worked through a lot of the items on our job list, including systems checks, aerodynamic and mechanical performance tests. The FW31 reliably completed just over 670kms today on only its third day on track. Kazuki will take over from Nico for the last day of testing tomorrow and for his first run in the new car."