Sebastian Vettel topped the timesheet at the third and final practice session for the 2013 Formula One SingTel Singapore Grand Prix on Saturday evening.

The Red Bull ace, favoured to win for the third time in the Republic, clocked 1min 44.173sec. He put in 15 laps.

Second was Lotus' Romain Grosjean, who was 0.191sec behind.

Mercedes again put in another strong showing, with third-placed Nico Rosberg (1:44.741) and Lewis Hamilton (1:44.921) separated by the second Red Bull of Mark weber (1:44.906).