His skiing journey is the first thing you didn't know about Jannik Sinner.

Everyone knows about Sinner's professional tennis career, while very few people know about his skiing journey. Sinner began skiing and tennis playing at age three. He was born and raised in Sexten, a town in Italy famous for producing top skiers.

Sinner's Father used to work as a chef, and his mother used to work as a waitress at a ski lodge in Sexteen. At age 8, Sinner was the national champion in Giant slalom, alpine skiing, and alpine snowboarding competition. He was a national runner-up by age 12.

During a short video tour with ATP, Sinner said, "In our parts, the first sport is, of course, skiing, I was second in Italy, but in the end, I decided to play tennis because I enjoyed it more."

 Jannik Sinner has been to the quarterfinals of a Grand Slam tournament four times. He defeated Alexander Zverev at Roland-Garros in 2020 and advanced to the eighth round before falling to Rafael Nadal.

 At the beginning of 2022, Sinner also advanced to the quarterfinals of the Australian Open before falling to Stefanos Tsitsipas. In June 2022, Sinner advanced to the last eight at Wimbledon before falling to Novak Djokovic in five sets despite holding a two-sets-to-love advantage.

He again reached another quarterfinal in the US Open in 2022, this time holding match point against Carlos Alcaraz, the eventual winner, before losing in a dramatic five-setter.

In 2016 Sinner began on a premier junior tour, ITF Junior Circuit, managed by the International Tennis Federation (ITF). Having limited success at Junior Circuit, he managed to move to a professional tour by the end of 2017.

Sinner played only one higher-level Grade A tournament, Trofeo Bonfigilo. He never played any high-level draw Grade 1 event in singles.

He reached the quarterfinals in 2018 after losing in the first round of Italy's Grade A competition in 2017. He only participated in that junior competition in 2018. He didn't participate in any junior Grand Slam competitions.

Sinner's highest junior ranking was a very low 133 due to the very few number of high-level tournaments he participated in.

At age 13 Sinner decided to leave skiing and join tennis full-time as he wanted to compete against an opponent, unlike skiing.

He moved to Bordighera and started training at Piatti Tennis Center Under coaches Riccardo Piatti and Massimo Sartori. Piatti was also part-time coach of Milos Raonic and Novak Djokovic.

His family was positive about his decision to join tennis full-time. Earlier, he used to train only twice a week.

At the training center, Sinner lived with a family of coach Luka Cvjetkovic. He trained with Piatti as the primary coach and Andrea Volpina as the secondary coach till February 2022. He then started training under coach Simone Vagnozzi.

Coach Darren Cahill joined the team in July 2022.

Sinner did not perform quite well in the junior circuit. In early 2018 he began playing on the ITF Men's Circuit With his low ranking in Junior Circuit, he was initially selected for ITF future events only.

Sinner used to play for ATP Challenger Tour events through wild cards. The event was a second-tier tour organized by the Association of Tennis Professionals.

Sinners held the only ITF title that year was in doubles; he finished the 2018 ITF season ranked 551.

On February 2019, Sinner won the first ATP Challenger title in Bergamo at age 17. He became the youngest person to win the challenger title in history.

Sinner ends the season, becoming the youngest player in the year-end-top at world No.78. He was named ATP Newcomer of the Year.

Sinner closed the 2020 season by winning the Sofia Open and ranking at world No.37. He became the youngest player to win an ATP championship and the youngest Italian tour-level champion in the Open Era.

In Early 2021 he claims his second career title at ATP with the Great Ocean Road Open, defecting Karen Khachavon.

He won the 2021 Atlanta Open and his first double title, partnering with Reily Opelka defecting Steve Johnson and Jordan Thompson.

After reaching the Vienna Open semifinals on November 1, Sinner became the first male player born in the 2000s to enter the top 10.

2022 was not his best year, as he sustained an injury at the 2022 Sofia Open semi-final and had to take a month's break.

He lost to Danni Medvedev in the 2022 Erste Bank Open quarterfinals.  Also, qualifier Marc-Andrea Huesler defeated him in the first round of his subsequent competition, the 2022 Rolex Paris Masters.

Jannik Sinner has won a total of six titles on the ATP Tour. He added a second title in Melbourne at the beginning of 2021 after winning his first in Sofia in 2020.

In Miami, he also reached his first Masters 1000 final but fell short to Hubert Hurkacz. In 2021, Sinner added three more victories, taking first in Antwerp, then in Washington and Sofia.

 In 2022, he added a sixth title by claiming victory in Umag. Additionally, he surprised the competition at the Milan 2019 NextGen ATP finals.

Jannik Sinner has accomplished so many titles at a young age. The six-time ATF Tour title holder is famous for his outstanding two-handed backhand.

Sinner has the most topspin on the ATP Tour owing to his amazing two-handed backhand. His pace is absolutely outstanding. Craig O, Shannessy analyst at the ATP WorldTour website, claims that the Italian player hits his backhand with more topspin than anyone else in the tour.

For his composed on-court manner and all-court maneuverability, Sinner has been compared to Roger Federer.

Federer praised him, saying, "What I like about him is that he almost has the same speed of shooting from the forehand and backhand."

He has the most topspin of any player on the ATP Tour, hitting the ball with an average of 1858 revolutions per minute and the fifth-fastest average speed of 111.2 kilometers per hour.

Sinner was born on 16 August 2001 im South Tyrol, northern Italy. He was born to Father Johann Sinner and his mother Siglinde Sinner and grew up in the town of Sexten.

While growing up, Sinne had an interest in skiing, football, and tennis. He chose tennis as his professional career and excelled in it.

He is a big football fan and supports the club AC Milan. Andreas Seppi is his tennis idol, and Sinner wants to surpass Seppi in terms of achievement. Due to which his other idols are Novak Djokovic and Roger Federer.

Jannik Sinner is nicknamed The Fox or Jan the Fox. He is highly active on Instagram and has over 718k followers as of January 2023.

The 21 years old Italian player has an estimated net worth of $3 million. His main source of income is his professional career. Apart from that, he also earns a good amount of money from brand endorsement and sponsorship.

The largest cash prize Sinner earned was $ 5,274,334. He is just 21 now, and we can assume that his net worth is going to be much bigger in the coming years.