Maurizio Arrivabene feels Ferrari have "the perfect combination" in their driver line-up for the upcoming Formula One season.

Ferrari confirmed the arrival of Sebastian Vettel last November, the German replacing Fernando Alonso following a hugely successful stint with Red Bull in which he won four world titles.

Vettel will partner Kimi Raikkonen, who won Ferrari's last drivers' championship back in 2007 and topped the timesheets with Vettel for much of the first week of testing in Jerez.

"They are two different characters," Ferrari boss Arrivabene is quoted as saying by Autosport. "Kimi is the kind of person who doesn't like to talk about stupid things; he likes to talk serious.

"Either you find after a couple of minutes he stops talking and gives you the hand, or after a couple of hours he's hugging you. The guys said this is strange. Drivers are strange. But he's a very good guy and a good driver.

"Seb is different - super professional. He reminds me of another German guy... [Michael Schumacher].

"I was impressed with the concentration and how he works on detail on the car. He's taking notes and talking about these notes at the briefings. It's great.

"We have two different drivers but they are both really committed. Sebastian is fully integrated into the team, he's 120 per cent part of the family.

"He's also a funny guy. He's a super person with his feet on the ground; very simple but I'm not surprised he won four world titles.

"After Michael, Kimi was the only world champion for Ferrari.

"We have the perfect combination."