Soaring temperatures could see three, potential four, pit-stops during the Malaysian Grand Prix, though weather forecasts suggest it may also rain on race day.

With track temperatures peaking at more than 60 degrees during FP2 and ahead of FP3, in addition to the typically high Malaysian humidity, drivers admit the challenging conditions were causing problems during free practice for both cars and driver.

"We had record track temperatures out there," said Rosberg. "It was more than 60 degrees on the asphalt and you can imagine we are actually sitting on the ground and I can feel the asphalt through the chassis and so the 60 degrees comes straight into the cockpit. It is extremely hot in the car."

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Looking ahead to the race, Toro Rosso's Carlos Sainz is certain there will be three stops made if temperatures remain so lofty and hints at there possibly being as many as four.

"A lot", he responded when asked how many stops there are likely to be. "Before coming here, two was the probability but after the long runs in FP2, the massive degradation means at least three."

Even so, the traditionally temperamental climate could yet throw a curve ball, with precipitation predicted at 90 per cent for Saturday and forecasts tipping it will remain for qualifying. In addition, there is rain forecast for Sunday too, approximately during the race.