Brazil - Felipe Massa has hailed Paddy Lowe for a noticeable turnaround inside the Williams team.
Brazilian Massa has driven for the famous British team since leaving Ferrari, but he says the immediate impact of the arrival of former Mercedes chief Lowe this year was palpable.
Unity in the team
Massa told UOL Grande Premio:"What he has done is unite the different departments.
"Before, one area would fight with another because a part was taking time to be ready, for example. That has changed. Now the areas are united in the right way, just like a big team."
But the 36-year-old said Williams is still lagging behind the really big teams in other ways.
The difference between big and small teams
He said: "I think we cannot compare on the financial side, as there are a lot of things that make the difference between a big team and a middle team."