Despite his great race Nico Rosberg lost his P2 to Kimi Raikkonen on penultimate lap due to a brake failure.
Hamilton gets P1 with Vettel behind him and Rosberg in third.
Both Mercedes drivers in top 3 splitted by Ferrari's Vettel.
German edges his teammate by one tenth, both Ferrari behind them with Raikkonen in P3. Teams were working through their tyre programs.
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.