2023 Yokkaichi Challenger – Singles

Yosuke Watanuki was the defending champion^[1] but lost in the second round to Giovanni Fonio.

Singles
2023 Yokkaichi Challenger
Champion	Zizou Bergs
Runner-up	Michael Mmoh
Score	6–2, 7–6(7–2)

Main article: 2023 Yokkaichi Challenger

Zizou Bergs won the title after defeating Michael Mmoh 6–2, 7–6^(7–2) in the final.

Seeds

1. Yosuke Watanuki (second round)
2. Jurij Rodionov (first round)
3. Michael Mmoh (final)
4. Zizou Bergs (champion)
5. Marc Polmans (semifinals)
6. Zdeněk Kolář (second round)
7. Leandro Riedi (first round)
8. Hsu Yu-hsiou (first round)

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
	5	Marc Polmans	5	4
	4	Zizou Bergs	7	6
								4	Zizou Bergs	6	77
								3	Michael Mmoh	2	62
	3	Michael Mmoh	6	6
		Coleman Wong	2	2

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	Y Watanuki	6	6
		Y Shimizu	3	4				1	Y Watanuki	6	2	5
		G Fonio	4	77	77				G Fonio	3	6	7
		K Ivanovski	6	65	65											G Fonio	1	78	2
		C İlkel	4	5											5	M Polmans	6	66	6
		M Echargui	6	7					M Echargui	7	2	2
	WC	R Noguchi	3	4				5	M Polmans	5	6	6
	5	M Polmans	6	6																		5	M Polmans	5	4
	4	Z Bergs	5	6	6																	4	Z Bergs	7	6
		A Çelikbilek	7	2	4			4	Z Bergs	6	6
		K Uchida	78	2	6				K Uchida	4	3
	Q	J-s Nam	66	6	1										4	Z Bergs	6	7
		S-c Hong	79	4	2										Q	J Trotter	3	5
		O Jasika	67	6	6				O Jasika	6	2	4
	Q	J Trotter	77	6				Q	J Trotter	2	6	6
	8	Y-h Hsu	65	2

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	7	L Riedi	2	2
		L Tu	6	6					L Tu	6	78
	LL	Yuki Mochizuki	0	4					G Blancaneaux	3	66
		G Blancaneaux	6	6												L Tu	3	3
	Q	H Moriya	6	6											3	M Mmoh	6	6
	Q	T Ito	3	2				Q	H Moriya	64	0
	WC	Renta Tokuda	2	3				3	M Mmoh	77	6
	3	M Mmoh	6	6																		3	M Mmoh	6	6
	6	Z Kolář	6	5	6																		C Wong	2	2
		Mathys Erhard	1	7	2			6	Z Kolář	4	2
	Q	Y Takahashi	3	3				Q	A Holmgren	6	6
	Q	A Holmgren	6	6											Q	A Holmgren	6	5	4
		N Nakagawa	2	77	4											C Wong	4	7	6
		C Wong	6	65	6				C Wong	6	6
	WC	R Sakamoto	6	6				WC	R Sakamoto	3	2
	2	J Rodionov	4	4