Sebastian Vettel led final free practice for the Singapore Grand Prix on Saturday as Lewis Hamilton's bid for a record-equalling eighth straight pole position looked in serious doubt.

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Ferrari's Vettel clocked 1min 45.682sec late in the dusk session, more than a second quicker than championship leader Hamilton of Mercedes, who wound up fifth fastest.

Can Hamilton equal his idol Ayrton Senna's record of eight poles in a row? Follow all the action from Singapore LIVE with Sport360.