Daniel Ricciardo is confident that Ferrari will benefit from Sebastian Vettel's ruthless streak when pushing for better performance.
The German left Red Bull after six seasons to race for the Scuderia, replacing McLaren-bound Fernando Alonso at the Italian constructor.
Ricciardo, who won three races for Red Bull in 2014, believes that Vettel's ability to get what he wants will boost both the driver and Ferrari in the long term.
He told Autosport: "The way he basically brings the people who work with him close to him is impressive. It's the way he demands and gets what he wants.
"We [racing drivers] are never happy with our cars and we always want something better from it - and I think the way he approaches that, he is quite ruthless but quite fair at the same time.
"He has a good balance of being serious and looking the team in the eye, and saying I need this. But he earns their respect by acting that way. He doesn't rest. He is not going to be happy being behind, and I think the way he goes about it is pretty good."
Ricciardo finished third in the drivers' championship during the 2014 season, 71 points ahead of Vettel.
