Valtteri Bottas has admitted he is "tingling" ahead of the debut of his 2013 race car.
After teammate Pastor Maldonado drives the new FW35 on day one in Barcelona, rookie Finn Bottas will get his first taste of the 2013 Williams on Wednesday.
Unlike every other F1 team, the Grove based team did not debut its new car recently at Jerez.
"I believe we made the right decision," 23-year-old Bottas told Turun Sanomat newspaper.
"It was our plan all along to bring the new car only to Barcelona, in order to give us more development time in the wind tunnel," he added.
Bottas admitted the anticipation is therefore great, insisting "I would be lying" if he denied he is "tingling" ahead of the debut of his first F1 racer.
He said: "Personally I have big expectations, and the entire team believes that we now have a better car than last year."