Mercedes driver Nico Rosberg topped the timing sheets for the second free practice session in Malaysia.

As the Malaysian heat intensified Nico Rosberg set the fastest time on the white-walled medium compound tyres in the second free practice session for Sunday’s Malaysian grand prix.

Track temperatures reached nearly 50 degrees Celsius during the ninety minute session which reveal a much closer pecking order. In particular, Red Bull’s Sebastain Vettel looked solid in both qualifying simulation and long run pace. Both Mercedes drivers were able to lap consistently on both compounds of tyre while Fernando Alonso and Kimi Raikkonen appeared far more comfortable with the F14T.

Rosberg’s fastest time of 1:39:909 was a whisker faster than Raikkonen who set a 1:39:944. Likewise the top ten was separated roughly six tenths of a second. Granted the level of fuel being carried by the respective teams are unknown at this stage.

The woes continued for Lotus as Pastor Maldonado failed to emerge from his garage for the entire session. Romain Grosjean managed fourteen laps before again pulling off the circuit. This time his issue was allegedly gearbox related.

The level of tyre degradation on the medium compound tyres appeared quite high as expected on the abrasive surface of the Sepang circuit. Nevertheless, it appeared to last for about seven laps before dropping off. However, the track will continue to rubber in throughout the weekend, barring no rain, which will see the tyres life extended slightly. Pirelli have reported that the difference between the two compounds are around 1 to 1.2 seconds per lap.

The laptimes on the board suggest that Mercedes are still favourites but the chasing pack, in the form of Ferrari and Red Bull, seem a lot closer than two weeks ago.