Sepang, Malaysia - Nico Rosberg was a familiar leader in the final practice session on Saturday for the Malaysian Formula One Grand Prix.

The German Rosberg clocked 1 minute 35.940 seconds for the 5.543-kilometres lap in Sepang in a Williams. He led from Australian Red Bull driver Mark Webber (1:36.048) and Brazilian Felipe Massa in a Ferrari (1:36.089).

Rosberg has topped five of the six practice sessions this season, all three last week in Australia and two of the three in Sepang. Finnish Ferrari driver Kimi Raikkonen was first the second Malaysian session on Friday.

Sepang, Malaysia  - Nico Rosberg lead Williams to dominate the first training for the Malaysia Grand Prix on Friday ahead of his teammate Kazuki Nakajima.

The 23-year-old German topped the timesheets at the 5.54-kilometre racetrack with 1:36.260 minutes, repeating his training dominance from last week's sessions ahead of the Melbourne race.

Melbourne winner Brawn GP's Jenson Button came in third at 1:36.305, his Brazilian team mate Rubens Barichello fourth, followed by Felipe Massa of Brazil and Finland's Kimi Raikkonen, both in Ferrari.

Stuttgart  - German Formula One driver Nico Rosberg has called for a minimum weight for Grand Prix drivers.

In an report by Der Spiegel news magazine made available ahead of Monday's publication, the Williams driver said that if a pilot did not weigh enough, weights should be placed in the car.

Several drivers are said to have lost a considerable amount of weight since last season to compensate for the heavier weight of their cars which has been brought about by new regulations.