Ferrari ends the session 1-2 with Williams' Bottas in third.
Fernando Alonso insists that a lack of power is not masking any unexpected deficiencies in the McLaren chassis – in other words he expects its handling to remain consistent as the engine performance is ramped up.
Toro Rosso boss Franz Tost remains convinced that Renault eventually sort out its problems, despite a string of failures for both Red Bull-backed teams.
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Check out how the standings changed after today's race. Lewis Hamilton and Mercedes extends the lead.
Mercedes finishes 1-2, Ferrari 3-4.
Hamilton pipes Rosberg, for pole position. Sebastian Vettel gets P3, with Raikkonen only in sixth.
Mercedes team 1-2 with both Ferrari behind. Red Bull still struggling with brakes issues.
Mercedes, Ferrari and Red Bull are in top three spots respectively. Top teams were practicing different tyre strategies.
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It was a quiet test in some respects for Derani and G-Drive Racing.
Sebastian Vettel managed to pipe both Mercedes drivers being on better tire strategy. Second Ferrari of Kimi Raikkonen is in fourth.
Check out how the standings changed after today's race. Lewis Hamilton and Mercedes still in the lead.
Lewis Hamilton managed to post fastest lap of 1:49.834 with Sebastian Vettel just less the a tenth slower. Nico Rosberg in third.
Nico Rosberg edges his teammate by almost two tenths. Kimi Raikkonen is in third.
The real race pace will be known only on Sunday.