Just like most kids in Sexten, Sinner was a keen skier. In fact, he was so talented, he was one of Italy’s top young skiers between the ages of 8 and 12.
Even though he focused on skiing, Sinner had been playing tennis, too, after his dad gave him a racquet when he was two-and-a-half years old.
“My favourite skier was Bode Miller, and my favorite tennis player is Roger Federer,” Sinner said in a phone interview earlier this year.
When he was 13, Sinner took a tough decision: he decided to end his skiing career, and focus on tennis instead.
“It was dangerous,” said Sinner. “If you fall wrong, you can put away a whole season. And in tennis, you can always play, you can play indoors, or outdoors. The most important thing is, in tennis, you can see the opponent. You can see who you are playing against. You know if you are up in the score, or down in the score, if you are going to have to change something, or not.
"And in skiing, you just go down alone, and you don’t know if you are faster than the other ones, or slower than the other ones, you just see red and blue targets, and you have to turn your skis, and hopefully not fall down.”