"Break me down mentally?" - Nico Rosberg. "I think he will struggle with that one."
Their battles may be played out on the track, but Lewis Hamilton and Nico Rosberg are also waging a war of the minds in 2014.
One silver-clad driver or the other will almost certainly be crowned this year's champion, and so far the ultra-dominant Brackley team's management is giving them a free run to go wheel-to-wheel.
"We are cautiously optimistic," said team boss Toto Wolff (in photo). "Perhaps more optimistic than cautious at the moment!"
Some believe it is a major psychological blow for the German.
"Break me down mentally?" Rosberg hit back when asked if Hamilton's superiority is getting to him.
"I think he will struggle with that one."
Hamilton, six months older than Rosberg, is often credited as perhaps the naturally fastest driver on the F1 grid, while it is said that Rosberg's speed is more analytically crafted.
"They are different characters," Wolff told the APA news agency.
"Lewis has instinct and merciless speed," said the Austrian. "Nico's preparation is meticulous. He has a great understanding of the car and is fascinated by the data."
But Wolff said Hamilton also does not neglect the hard work off-track.
However, Wolff said Hamilton's character has another side.
"He is incredibly sensitive to criticism," he explained, "with strong reactions. But this is also why he drives as he does."
Team chairman Niki Lauda said after Hamilton's Barcelona win that the 29-year-old Briton is currently "unbeatable".
Earlier, 1992 world champion Nigel Mansell hailed Hamilton's 2014 form as "close to perfection".
Rosberg replied: "Lewis is just a human, with strengths and weaknesses. And I know what I can do."
Some predict that Hamilton's advantage may eventually get to Rosberg, but Wolff is not so sure.
"He (Rosberg) has no problem dealing with the situation," Wolff is quoted by Speed Week.
"Of course he is disappointed to finish second behind his teammate, but I have no doubt that they will both have their triumphs against one another," he added.