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Jannik Sinner (born 16 August 2001) is an Italian professional tennis player. He has been ranked world No. 1 in men's singles by the Association of Tennis Professionals (ATP), including as the year-end No. 1 in 2024. Sinner has won 26 ATP Tour–level singles titles, including four majors, as well as seven Masters 1000 events and two ATP Finals titles. He also led Italy to back-to-back Davis Cup crowns in 2023 and 2024.
Despite limited success as a junior, Sinner began playing in professional men's events aged 16, and became one of the few players to win multiple ATP Challenger Tour titles at age 17. In 2019, he won the Next Generation ATP Finals and the ATP Newcomer of the Year award, and two years later became the first player born in the 2000s to enter the top 10 in rankings. Sinner won his first Masters 1000 title at the 2023 Canadian Open and finished the season as a runner-up at the ATP Finals.
At the 2024 Australian Open, Sinner defeated world No. 1 Novak Djokovic followed by Daniil Medvedev in a five-set final to win his first major title. He went on to win both the US Open and the ATP Finals to finish the year at the top of the ATP rankings, becoming the first Italian player to reach world No. 1.
In 2025, Sinner defended his title at the Australian Open. Following a three-month suspension for the accidental administration of clostebol, he faced Carlos Alcaraz in the finals of each of the remaining majors, including a five-set loss at the French Open, and won his fourth major title at Wimbledon. He ended the season by winning his second consecutive ATP Finals, defeating Alcaraz in the final.
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![]() ATP No1 Ranking 2025-11-03 | ![]() ATP No1 Ranking 2024-06-10 |




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