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 ATP Challenger title

He lifted his maiden trophy at the ATP 2022 Matsuyama Challenger.

2023-2024: Masters debut, Three Challenger finals

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.^[5]

Singles: 23 (15–8)

More information Result, W–L ...

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

Close

Doubles (8–2)

More information Outcome, Date ...

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

Close

Singles: 1 (1 runner-up)

More information Outcome, Year ...

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

Close