# Hong Seong-chan

Hong Seong-chan (born 30 June 1997) is a South Korean tennis player. Hong has a career high ATP singles ranking of world No. 141 achieved on 9 September 2024 and a doubles ranking of No. 359 achieved on 16 January 2023. He is the current Korean No. 1 singles player.
Since 2015, Hong has been a member of the South Korean Davis Cup team.

## Career
### Juniors

Hong reached the final of the 2015 Australian Open junior championships, falling to top seed Roman Safiullin in the final.
Hong had a career high junior ranking of No. 3.

### 2022: Maiden Challenger title

He lifted his maiden trophy at the 2022 Matsuyama Challenger.

### 2023–2024: Masters debut, Three Challenger finals, top 150

He reached the last round of qualifying at the 2023 Rolex Shanghai Masters.
Ranked No. 227, he qualified for the 2024 BNP Paribas Open having entered the qualifying competition as an alternate after Yosuke Watanuki‘s withdrawal, making his Masters debut.
Ranked No. 175 he qualified for the ATP 500 Citi DC Open in Washington and defeated Adam Walton and upset third seed Karen Khachanov, for his first top 30 win.
Following semifinal showing at the 2024 International Challenger Zhangjiagang, he reached the top 150 at world No. 141 on 9 September 2024.

## ATP Challenger and ITF Tour Finals
### Singles: 23 (15–8)

* Legend
* ATP Challenger Tour (1–3)
* ITF Futures/World Tennis Tour (14–5)
* Finals by surface
* Hard (14–8)
* Clay (1–0)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | Dec 2015 | Qatar F5, Doha | Futures | Hard | Joris De Loore | 3–6, 2–6 |
| Loss | 0–2 | Jan 2016 | Turkey F4, Antalya | Futures | Hard | Joris De Loore | 4–6, 2–6 |
| Win | 1–2 | Feb 2016 | Turkey F5, Antalya | Futures | Hard | Roman Safiullin | 6–2, 7–5 |
| Win | 2–2 | Feb 2016 | Turkey F6, Antalya | Futures | Hard | Frederico Ferreira Silva | 7–5, 6–4 |
| Win | 3–2 | Feb 2016 | Turkey F7, Antalya | Futures | Hard | Dimitar Kuzmanov | 6–4, 6–3 |
| Win | 4–2 | Jul 2016 | Vietnam F1, Thủ Dầu Một | Futures | Hard | Rishab Agarwal | 6–1, 6–2 |
| Win | 5–2 | Aug 2016 | Vietnam F3, Thủ Dầu Một | Futures | Hard | Jacob Grills | 6–1, 6–7$^{(4–7)}$, 6–0 |
| Loss | 5–3 | Sep 2016 | Thailand F2, Hua Hin | Futures | Hard | Sriram Balaji | 4–6, 6–7$^{(3–7)}$ |
| Loss | 5–4 | Jun 2017 | Korea F1, Sangju | Futures | Hard | Daniel Nguyen | 4–6, 7–5, 2–6 |
| Win | 6–4 | Mar 2018 | Japan F3, Kofu | Futures | Hard | Makoto Ochi | 7–6, 6–1 |
| Win | 7–4 | Mar 2019 | M15 Nishi-Tokyo, Japan | World Tennis Tour | Hard | Shuichi Sekiguchi | 7–6$^{(7–2)}$, 6–4 |
| Win | 8–4 | Jun 2019 | M15 Daegu, South Korea | World Tennis Tour | Hard | Na Jung-woong | 6–0, 6–3 |
| Win | 9–4 | Jun 2019 | M15 Gimcheon, South Korea | World Tennis Tour | Hard | Yuta Shimizu | 6–1, 5–7, 6–2 |
| Win | 10–4 | Aug 2019 | M15 Hua Hin, Thailand | World Tennis Tour | Hard | Dayne Kelly | 7–5, 6–3 |
| Win | 11–4 | Apr 2021 | M15 Antalya, Turkey | World Tennis Tour | Clay | Sanjar Fayziev | 6–1, 6–3 |
| Win | 12–4 | Jul 2021 | M15 Monastir, Tunisia | World Tennis Tour | Hard | Luca Giacomini | 7–5, 6–3 |
| Win | 13–4 | Apr 2022 | M15 Chiang Rai, Thailand | World Tennis Tour | Hard | Lý Hoàng Nam | 6–3, 3–6, 7–5 |
| Win | 14–4 | Jun 2022 | M25 Tamuning, Guam | World Tennis Tour | Hard | Rio Noguchi | 6–3, 6–2 |
| Loss | 14–5 | Jun 2022 | M25 Tamuning, Guam | World Tennis Tour | Hard | Sho Shimabukuro | 6–3, 4–6, 1–6 |
| Win | 15–5 | Nov 2022 | Matsuyama, Japan | Challenger | Hard | Wu Tung-lin | 6–3, 6–2 |
| Loss | 15–6 | Jan 2024 | Nonthaburi, Thailand | Challenger | Hard | Matteo Gigante | 4–6, 1–6 |
| Loss | 15–7 | Feb 2024 | Bangalore, India | Challenger | Hard | Stefano Napolitano | 6–4, 3–6, 3–6 |
| Loss | 15–8 | Apr 2024 | Busan, South Korea | Challenger | Hard | Yasutaka Uchiyama | 6–7$^{(4–7)}$, 3–6 |

### Doubles (8–2)

* Legend
* Grand Slam
* ATP Masters Series
* ATP Tour
* Challengers
* ITF Futures (8–2)
| Outcome | Date | Tournament | Surface | Partner | Opponent | Score |
| Win | 24 May 2015 | Daegu, South Korea | Hard | Lee Hyung-taik | Nam Ji-sung Song Min-kyu | 6–3, 6–3 |
| Loss | 5 March 2017 | Antalya, Turkey | Hard | Benjamin Lock | Pedro Bernardi Christopher Díaz Figueroa | 6–2, 2–6, 10–12 |
| Loss | 11 June 2017 | Gimcheon, South Korea | Hard | Kim Young-seok | Kim Hyun-joon Noh Sang-woo | 6–2, 1–6, 12–14 |
| Win | 23 June 2018 | Daegu, South Korea | Hard | Chung Yun-seong | Kwon Soon-woo Lim Yong-kyu | W/O |
| Win | 1 September 2019 | Hua Hin, Thailand | Hard | Shin San-hui | Hsu Yu-hsiou Lin Wei-de | 6–4, 6–4 |
| Win | 19 June 2021 | Monastir, Tunisia | Hard | Nam Ji-sung | Matias Franco Descotte Filip Peliwo | 6–3, 6–1 |
| Win | 3 July 2021 | Monastir, Tunisia | Hard | Nam Ji-sung | Timur Kiyamov Kelsey Stevenson | 6–2, 6–4 |
| Win | 23 January 2022 | Antalya, Turkey | Clay | Nam Ji-sung | Dragoș Nicolae Mădăraș Oleksandr Ovcharenko | 6–3, 6–3 |
| Win | 6 February 2022 | Antalya, Turkey | Clay | Nam Ji-sung | Sarp Ağabigün Mircea-Alexandru Jecan | 6–4, 6–4 |
| Win | 6 April 2022 | Chiang Rai, Thailand | Hard | Kim Cheong-eui | Nam Ji-sung Song Min-kyu | 4–6, 7–6$^{(7–2)}$, 10–8 |

## Junior Grand Slam finals
### Singles: 1 (1 runner-up)

| Outcome | Year | Championship | Surface | Opponent | Score |
| Loss | 2015 | Australian Open | Hard | Roman Safiullin | 5–7, 6–7$^{(2–7)}$ |