Rome 
Paris 
Mauthausen 
Santos 
Prague II 
Oeiras 4 
Tunis 
W100 Madrid Tennis. Played Chan Hong Seong. Season 2024
Country 
South Korea. Ranking ATP 198.
South Korea. Ranking ATP 198. Taipei City Challenger | ||||
|---|---|---|---|---|
| 16.05.2024 | Quarter-finals | Hsu Yu Hsiou — Chan Hong Seong | — — |
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| 15.05.2024 | Second round | Ellis Blake — Chan Hong Seong | 0:2 (2:6, 2:6) |
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| 14.05.2024 | First round | Echargui Moez — Chan Hong Seong | 0:2 (6:7, 2:6) |
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| Wuxi | ||||
| 08.05.2024 | Second round | Kachmazov Alibek — Chan Hong Seong | 2:1 (6:1, 2:6, 7:6) |
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| 06.05.2024 | First round | Marchenko Illya — Chan Hong Seong | 0:2 (3:6, 3:6) |
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| Gwangju Challenger | ||||
| 18.04.2024 | Second round | Chan Hong Seong — Shimabukuro Sho | 0:2 (4:6, 4:6) |
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| 16.04.2024 | First round | Marchenko Illya — Chan Hong Seong | 0:2 (3:6, 2:6) |
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| Busan Challenger | ||||
| 14.04.2024 | Final | Uchiyama Yasutaka — Chan Hong Seong | 2:0 (7:6, 6:3) |
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| 13.04.2024 | Semi-finals | Chan Hong Seong (Retired) — Kwon Soon-Woo | Walkover |
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| 12.04.2024 | Quarter-finals | Wong Chak Lam Coleman — Chan Hong Seong | 1:2 (4:6, 6:3, 2:6) |
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| 11.04.2024 | Second round | Lajal Mark — Chan Hong Seong | 0:2 (4:6, 4:6) |
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| 09.04.2024 | First round | Chan Hong Seong — Virtanen Otto | 2:0 (6:2, 6:2) |
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 Phoenix | ||||
| 11.03.2024 | Qualifications - 1st round | Goffin David — Chan Hong Seong | 2:0 (6:2, 6:4) |
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| ATP - Pacific Life Open | ||||
| 08.03.2024 | First round | Mensik Jakub — Chan Hong Seong | 2:0 (6:3, 6:4) |
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| 05.03.2024 | Qialification final | Nagal Sumit — Chan Hong Seong | 1:2 (6:2, 2:6, 6:7) |
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| 04.03.2024 | Qualifications - 1st round | Chan Hong Seong — Kwon Soon-Woo | 2:0 (6:3, 6:3) |
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 New Delhi | ||||
| 27.02.2024 | First round | Chan Hong Seong — Boyer Tristan | 1:2 (3:6, 7:6, 6:7) |
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| Pune | ||||
| 20.02.2024 | First round | Chan Hong Seong — Kasnikowski Maks | 0:2 (4:6, 2:6) |
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| Bengalaru | ||||
| 18.02.2024 | Final | Chan Hong Seong — Napolitano Stefano | 1:2 (6:4, 3:6, 3:6) |
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| 17.02.2024 | Semi-finals | Chan Hong Seong — Roca Batalla Oriol | 2:1 (6:2, 3:6, 6:3) |
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| 16.02.2024 | Quarter-finals | Ramanathan Ramkumar — Chan Hong Seong | 1:2 (5:7, 7:5, 4:6) |
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| 14.02.2024 | Second round | Zakharov Alexey — Chan Hong Seong | 0:2 (4:6, 5:7) |
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| 13.02.2024 | First round | Chan Hong Seong — Schoolkate Tristan | 2:0 (6:4, 6:3) |
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 Davis Сup World Group | ||||
| 03.02.2024 | First round | Diallo Gabriel — Chan Hong Seong | 2:1 (7:5, 4:6, 6:1) |
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| 02.02.2024 | First round | Pospisil Vasek — Chan Hong Seong | 2:0 (6:4, 6:3) |
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 Nonthaburi 3 | ||||
| 21.01.2024 | Final | Gigante Matteo — Chan Hong Seong | 2:0 (6:4, 6:1) |
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| 20.01.2024 | Semi-finals | Fonio Giovanni — Chan Hong Seong | 0:2 (4:6, 1:6) |
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| 19.01.2024 | Quarter-finals | Novak Dennis (Retired) — Chan Hong Seong | 0:1 (2:6) |
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| 17.01.2024 | Second round | Chan Hong Seong — Hassan Benjamin | 2:0 (6:2, 6:3) |
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| 16.01.2024 | First round | Chan Hong Seong — Roca Batalla Oriol | 2:1 (3:6, 7:6, 6:3) |
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| 15.01.2024 | Qialification final | Chan Hong Seong — Caruso Salvatore | 2:1 (6:2, 6:7, 6:2) |
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| Nonthaburi 2 | ||||
| 09.01.2024 | First round | Holt Brandon — Chan Hong Seong | 2:0 (6:2, 6:2) |
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