2023 Japan Open Tennis Championships – Singles

Ben Shelton defeated Aslan Karatsev in the final, 7–5, 6–1 to win the singles tennis title at the 2023 Japan Open. It was his first ATP Tour title. He and his father Bryan Shelton became the fourth father-son duo in the Open Era to win tour-level singles titles.^[1]

Singles
2023 Japan Open Tennis Championships
Champion	Ben Shelton
Runner-up	Aslan Karatsev
Score	7–5, 6–1
Draw	32 (4Q / 3WC)
Seeds	8

Main article: 2023 Japan Open Tennis Championships

Taylor Fritz was the defending champion,^[2] but lost in the second round to Shintaro Mochizuki.

Seeds

1. Taylor Fritz (second round)
2. Casper Ruud (second round)
3. Alexander Zverev (first round)
4. Alex de Minaur (quarterfinals)
5. Tommy Paul (quarterfinals)
6. Frances Tiafoe (first round)
7. Karen Khachanov (first round)
8. Félix Auger-Aliassime (quarterfinals)

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• ITF = ITF entry
• PR = Protected ranking
• SR = Special ranking
• SE = Special exempt
• JE = Junior exempt
• JR = Junior Accelerator Programme entrant
• CO = College Accelerator Programme entrant
• NG = Next Gen Accelerator Program entrant
• w/o = Walkover
• r = Retired
• d = Defaulted

Finals

	Semifinals							Final
	WC	Shintaro Mochizuki	3	4
		Aslan Karatsev	6	6
									Aslan Karatsev	5	1
									Ben Shelton	7	6
		Ben Shelton	62	77	6
	Q	Marcos Giron	77	65	4

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	T Fritz	6	6
		C Norrie	4	3				1	T Fritz	6	4	62
	WC	S Mochizuki	6	77				WC	S Mochizuki	0	6	77
		TM Etcheverry	4	65											WC	S Mochizuki	7	2	7
	WC	S Shimabukuro	4	6	3											A Popyrin	5	6	5
	Q	C Garín	6	3	6			Q	C Garín	6	63	2
		A Popyrin	6	6					A Popyrin	4	77	6
	7	K Khachanov	4	2																		WC	S Mochizuki	3	4
	4	A de Minaur	4	77	77																		A Karatsev	6	6
	Q	J Draper	6	64	61			4	A de Minaur	6	7
		F Cerúndolo	4	1					D Schwartzman	0	5
		D Schwartzman	6	6											4	A de Minaur	3	2
		Z Zhang	3	6	77											A Karatsev	6	6
		H Hurkacz	6	4	64				Z Zhang	3	4
		A Karatsev	6	77					A Karatsev	6	6
	6	F Tiafoe	3	64

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	5	T Paul	3	6	6
		D Altmaier	6	1	3			5	T Paul	6	6
		M McDonald	7	6					M McDonald	4	2
		M Purcell	5	4											5	T Paul	64	3
		B Shelton	3	6	77											B Shelton	77	6
	Q	T Daniel	6	4	62				B Shelton	65	6	6
		J Thompson	6	6					J Thompson	77	4	3
	3	A Zverev	3	4																			B Shelton	62	77	6
	8	F Auger-Aliassime	77	62	6																	Q	M Giron	77	65	4
		A Vukic	63	77	2			8	F Auger-Aliassime	6	6
		S Ofner	62	77	7				S Ofner	4	1
		C O'Connell	77	65	5										8	F Auger-Aliassime	1	4
		Y Nishioka	614	6	1										Q	M Giron	6	6
	Q	M Giron	716	4	6			Q	M Giron	6	6
	WC	Y Watanuki	66	3				2	C Ruud	3	4
	2	C Ruud	78	6

Qualifying

Seeds

1. Rinky Hijikata (qualifying competition)
2. Marcos Giron (qualified)
3. Jack Draper (qualified)
4. Taro Daniel (qualified)
5. Cristian Garín (qualified)
6. Jurij Rodionov (qualifying competition)
7. Brandon Nakashima (first round)
8. Wu Tung-lin (first round)

Qualifiers

1. Cristian Garín
2. Marcos Giron
3. Jack Draper
4. Taro Daniel

Qualifying draw

First qualifier

	First round							Qualifying competition
	1	Rinky Hijikata	6	7
	WC	Naoki Nakagawa	4	5
								1	Rinky Hijikata	7	3	2
								5	Cristian Garín	5	6	6
		Philip Sekulic	63	3
	5	Cristian Garín	77	6

Second qualifier

	First round							Qualifying competition
	2	Marcos Giron	6	6
	WC	Kaichi Uchida	4	3
								2	Marcos Giron	6	6
									Yasutaka Uchiyama	3	2
		Yasutaka Uchiyama	78	4	6
	7	Brandon Nakashima	66	6	3

Third qualifier

	First round							Qualifying competition
	3	Jack Draper	6	6
		Yuta Shimizu	4	4
								3	Jack Draper	6	6
								6	Jurij Rodionov	1	0
	WC	Hiroki Moriya	4	7	3
	6	Jurij Rodionov	6	5	6

Fourth qualifier

	First round							Qualifying competition
	4	Taro Daniel	61	6	6
		Jason Jung	77	3	3
								4	Taro Daniel	7	6
									Rio Noguchi	5	4
		Rio Noguchi	5	6	6
	8	Wu Tung-lin	7	0	3