There were many things in my childhood I sacrificed: I started travelling quite young, compromising school in terms of learning and time with friends doing normal stuff as a kid you want to do. But obviously I wouldn't change a day.

Improving, for me, is quite natural as I'm always critical of myself.

You never want to be behind your team-mate at the end of the year, that's definitely always going to be my goal.

With F1, it's really a combination of many things. You have to have good endurance, good strength in certain muscles, you need to be fast, have good reactions and good decisions. It's not as simple as one thing. You need to be a complete athlete.