Felipe Massa is hopeful that Williams will have an impressive 2014 Formula season after the Wantage team produced a solid performance at last month's Jerez test.
After leaving Ferrari at the end of last season, the Brazilian made a "good start" at last month's first pre-season test at the Andalucian circuit and recorded the second quickest time
"It always helps to start well, especially now that we have a completely different car, which requires a completely different driving style," Massa said during Tuesday's news conference.
"I'm really motivated, this is a special moment for me.
"I changed to a team that welcomed me with open arms. I needed this change and I think the team needed too."
The 32-year-old refused to get ahead of himself, though, adding that he will have a better idea of how the car compares with the rest of the grid at the season's first race next month.
"I think there's a lot to learn with the car and a lot has to be done to make the car improve," Massa added.
"It's hard to say right now how good we will be. Usually, in the first races it will be difficult just to finish the race. But it was a good start, I was happy."
Before the start of the season in Australia on March 16, two more testing sessions will take place in Bahrain, the first starting on February 19.