My kids are not known, and I think that is very important. So far they have lived a normal life, and will continue to do so. I feel they should have the possibility to live a free life without the burden of fame I have created.

The switch from ten-cylinder to eight-cylinder engines means that each manufacturer has to redevelop its power train. Not all will manage to successfully combine performance with reliability the first time around. That could shake things up a bit when it comes team hierarchy.

I decided on a vision. I think I maybe join Toyota at the midpoint of a project, whose long-term goal is winning world championships. Also I have my big ambition, the drivers' world championship. That is not abandoned - entirely the opposite. I am young enough and motivated enough to make a new start in order to reach this goal.

Let's put it this way, I like number seven.

When you're very successful, you become careless and try to turn many things into routine.

Psychologically speaking, it's very important to be in good shape. I work in a sport that requires you to react quickly and be in excellent shape. Besides, things don't get easier as you get older.

Technology has certainly reduced performance differences among drivers. Whereas a talented driver could get a half-second out of every lap in the past, nowadays talent makes up for only about one or two tenths of a second. But the driver is still the key factor.