Formula One: Red Bull's Vettel on top after final practice at Singapore Grand Prix

Red Bull driver Sebastian Vettel of Germany arrives at the paddock for the third practice session of the Formula One Singapore Grand Prix on Saturday, Sept 21, 2013. Vettel topped the timesheet at the third and final practice session for the 201
Red Bull driver Sebastian Vettel of Germany arrives at the paddock for the third practice session of the Formula One Singapore Grand Prix on Saturday, Sept 21, 2013. Vettel topped the timesheet at the third and final practice session for the 2013 Formula One SingTel Singapore Grand Prix on Saturday evening. -- PHOTO: AFP

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).