Ferrari hasn't shown what it can do yet - Rosberg

Championship leader Nico Rosberg believes his early success this season will not allow him or Mercedes to become complacent towards Ferrari which has yet to show its true colors.

While the Scuderia has struggled, especially in the last two races, while appearing competitive, the relative underperformance takes nothing away from the potential threat posed by the house of Maranello.

"Ferrari haven't really shown what they can do at all yet, they've had so many mishaps all the time, and we really think they are very, very close to us," Rosberg said.

"So we really need to keep our heads down, keep pushing. Even in qualifying Kimi messed up, otherwise he would have been on it, close to us. So we need to keep going."

While Rosberg keeps a watchful on the red cars, he also believes it's only a matter of time before team mate Lewis Hamilton starts breathing down his neck.

But the Mercedes driver also pinpointed Red Bull's current form as the Milton Keynes outfit finally appears to be extracting itself from the doldrums.

"Red Bull was a surprise last weekend, they were close in qualifying, and close in the race.

"Although we do see Ferrari right on us, and Red Bull were still half a second away this weekend, and that's still a big chunk.

"But they did make a big step, which was a surprise, considering that they likely don't have as much engine power as us. They are a force to be reckoned with as well."

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