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Fernando Alonso's entire life has been geared towards Formula 1. Now that has been removed, his big challenge will be filling that void once his World Endurance and Indy 500 exploits are out of the way halfway through next year.
"A career in sports, and it's also true for racing drivers, starts when you are very young.
"You wake up every morning, with the north star staring at you. It helps you know where you are going. Every day you think to yourself you will try to become as good a racing driver as you can be. And that is what you do that day, and the next day, and the next day. And so on.
"So it is a little bit discombobulating when you spend your entire conscious life with that goal in mind, and then all of a sudden the north star moves. You have to replace it with a different one, and it's not easy."
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