Fernando Alonso says he won't consider walking away from Formula One until he has that third World title.
The 32-year-old won his back-to-back titles with Renault in 2005 and 2006.
Falling short of the mark during his year with McLaren and his subsequent return to Renault, Alonso moved to Ferrari in 2010.
That has also failed to yield success with his best result being three runner-up finishes.
Alonso told BBC Sport: "We are still hungry for success, waiting for our opportunity to become Champion.
"This is the main goal and you don't think of retiring until you get some satisfaction."
He added: "It is something I am working for and hoping for.
"Three titles means a step. It is not that I'm not happy with two but the third puts you in a list of very important names.
"I have been close twice and hopefully the next opportunity we have we don't miss it again."
Pressed as to how many years of racing he has left in him, he said: "I think I can carry on long enough to win and to be competitive for some good years.
"I don't know how many - three, five, seven. I don't think it should be any problem."
The double World Champion also spoke of his relationship with Ferrari president Luca di Montezemolo, adamant that they are on good terms despite speculation to the contrary.
"We talk very, very often, once a week, and when it is a race weekend we talk three times during the weekend. Sometimes I talk more with him than with my family.
"We know when the results are not coming everything you say will be interpreted in the wrong way, and the same for him. But definitely there are zero problems."
He also backed Ferrari to turn their fortunes around, confident the team can give him a Championship-winning car.
"I must, and I need to, believe. There is the potential there. We have all the ingredients and we just need to put them all together.
"I am very proud to be part of this team and I know that winning with Ferrari will mean more than winning with another team and it is something we want to do."
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