In our latest 'star in the car' edition as part of hit show Game, Set and Mats, we spoke to Rafael Nadal about his greatest rival, his hopes and ambitions, and his biggest fear.
Nadal was asked to reveal something about himself that people do not already know.
"I really hate the dark. I’m scared when it gets dark. Sometimes I need to sleep with the TV on."
So not Roger Federer, not a knee brace, but the dark.
He may be a warrior on the court, but he can be very frightened off it, as we learned.
Even the greatest sporting heroes are scared sometimes.