Williams is determined to continue this positive momentum into the new season.
The meteoric return to form of his old title-winning team Williams last year surprised 1997 world champion Jacques Villeneuve
Valtteri Bottas topped the charts on the opening day of Abu Dhabi testing.
The team’s first double podium finish since 2005 secured third in the Constructors’ Championship with Valtteri Bottas fourth and Felipe Massa seventh in the Drivers’ Championship.
Two-stop strategy most likely: three-stop sprint strategy Is also possible.
Valtteri Bottas:: "It is important for the team to get third in the championship and we have set ourselves up well to achieve that."
Lewis Hamilton was nearly four tenths adrift of his teammate.
Mercedes-powered cars lead the top-4 positions.
Felipe Massa: "The Mercedes are still looking quick, but we will keep working to close the gap."
Championship leader finishes first ahead of title rival Rosberg in opening practice at Yas Marina Circuit
Valtteri Bottas: "The double points could be interesting and we will try and play it to our advantage."
Williams Martini Racing has extended its advantage over Ferrari for third in the Constructors’ Championship to 44 points.
Williams head of vehicle performance Rob Smedley says that while the team has made strides this year the team still has to change its culture in order to become a regular winner once more.
Both drivers were pushing the Mercedes cars hard for a front row position, but neither driver was able to complete a clean final flying lap in Q3
Felipe Nasr’s last FP1 session for Williams.
Both Williams drivers showed strong and consistent pace in all three sessions to lock out the second row of the grid.
Rosberg takes pole for the ninth time this season.
The following is a transcript from Thursday's press conference.
Who's got the most momentum heading into Austin?
Valtteri Bottas finished third and Felipe Massa 11th in today’s Russian Grand Prix
Lewis Hamilton continued his dominance at the Russian venue.
Valtteri Bottas: "Third is a good result and we have strong race pace so hopefully we can battle with the Mercedes cars and secure another podium finish tomorrow."
Lewis Hamilton will start the inaugural Russian Grand Prix from the front of the grid after claiming his seventh pole position of the season at the Sochi Autodrom.
Lewis Hamilton overshadowed his nearest rival by more than eight tenths. McLaren rookie outpaced his teammate. Fernando Alonso in third in his Ferrari.
As Jules Bianchi lies critically ill in a Japanese hospital, grave questions are being asked about the circumstances surrounding his terrifying collision with a recovery vehicle on Sunday.
The race ended early due to an accident involving Jules Bianchi.
Bottas qualified third for the sixth time this season with Felipe Massa fourth.