Felipe Massa: "We had another good day with over 100 laps completed."
Veteran engineer Pat Symonds admits factory Merc squad is still out front, but thinks Williams is poised to lead the chase.
Valtteri Bottas: "The day was busy and we know there is still more to come, I feel positive and the balance was good."
Felipe Massa: "The FW37 never showed a sign of an issue and this has been the case since we arrived at the first test in Jerez."
Valtteri Bottas: "The FW37 remains reliable but we have quite a way to go before we are at the level we want to be,"
Team will be back on track tomorrow with Valtteri Bottas at the wheel for the final day of the second test.
Felipe Massa: "We completed the programme for the day without any unexpected issues."
Brazilian Sauber driver has his say on testing collision at Barcelona’s Turn 5.
Briton's Williams was on out-lap when Sauber’s Brazilian ‘came across and hit me’.
Rod Nelson: "We have had no issues with the car today, so have made good progress."
Healthy teams should have priority over a rush to boost power outputs, according to veteran engineer.
Valtteri Bottas: "There are a lot of strengths in this car and we’ve made good progress in just one day, so I am very pleased."
The team showed strong development throughout last season and aim to continue this as the regulations show minimal changes for the new season ahead.
GP3 champion Alex Lynn has joined Williams as the team's development driver, in addition to his already announced GP2 programme with DAMS.
Nine weeks after the 2014 finale, Formula One is now counting down the mere days before the resumption of track action.