It's a special thing to become the first person to win a tournament, especially when they have many, many years left in their career. The inaugural Next Gen ATP Finals went down in Milan last week, and Hyeon Chung won the crown, defeating Andrey Rublev, 3-4 (5), 4 - 3 (2), 4-2, 4-2.

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Alone, that would have been a special achievement, but this is also the South Korean's first ATP singles title of his career. It's also the first time a South Korean has won an ATP title since 2003, when Hyung-Taik Lee won Sydney.

Chung won all of his matches in the round-robin tournament, earning $390,000 in prize money (but no ATP points).

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He finishes the year ranked No. 59.