Nico Rosberg has said that Williams have a 'good handle on the way to go' with the Toyota-powered FW31 following practice today at Valencia for Sunday's European Grand Prix.
Rosberg languished outside the top-ten in the first session and was only 14th fastest, but he bounced back in the second, ending the day fourth overall on a 1 minute 40.385 seconds.
Indeed while he was 0.981 seconds off pace setter, Fernando Alonso, he was a lot closer to the Brawn GP cars of Jenson Button and Rubens Barrichello, who were second and third respectively, and only a tenth or so ahead.
Speaking following the opening day to the eleventh round in the 2009 F1 World Championship, Rosberg was cautiously optimistic about his prospects for the rest of the weekend.
“I had a difficult start in the morning because the tyres grained straightaway. I was then left with a grained set for the remainder of the session which meant I didn't learn much at all,” Rosberg reflected. “The afternoon though was much better as we managed a good tyre test so we now have much more information for Sunday.
“We also made some positive set-up changes and have a good handle on which way to go with the car.
“In general, it was okay today. Performance-wise, we are not quite where we want to be so we have some further analysis to do ahead of tomorrow, but that should help us improve. We will wait and see."
Meanwhile Rosberg's Williams team-mate Kazuki Nakajima also fared well and he was seventh in FP1 and fifth in FP2.
He was more upbeat about the team's performance and the possibilities for this event.
“I think it was a good day for us,” Nakajima added. “We seem to have good long run pace and, even on the new tyres, our times were decent on the short runs as well.
“The track was fairly green at the start of the day, but improved throughout the two sessions and will continue to do so for tomorrow's qualifying, which I am really looking forward to.”