Singles
2023 Istanbul Challenger
Champion	Damir Džumhur
Runner-up	Lukáš Klein
Score	7–6(7–5), 6–3

Radu Albot was the defending champion^[1] but chose not to defend his title.

Damir Džumhur won the title after defeating Lukáš Klein 7–6^(7–5), 6–3 in the final.

Seeds

Draw

Finals

	Semifinals							Final
		Nick Hardt	4	3
	7	Damir Džumhur	6	6
								7	Damir Džumhur	77	6
								3	Lukáš Klein	65	3
	3	Lukáš Klein	77	62	77
	2	Jesper de Jong	62	77	65

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	S-w Kwon	0	1
		N Hardt	6	6					N Hardt	6	3	78
		S Mansouri	3	4					B Tomic	2	6	66
		B Tomic	6	6												N Hardt	1	77	4
		M Copil	2	4												A Çelikbilek	6	65	1r
	Q	Y Oliel	6	6				Q	Y Oliel	6	4	3
		A Çelikbilek	6	6					A Çelikbilek	2	6	6
	5	G Onclin	1	0																			N Hardt	4	3
	4	D Prižmić	6	63	7																	7	D Džumhur	6	6
		L Wessels	2	77	5			4	D Prižmić	4	6	6
	Q	B Bicknell	65	77	6			Q	B Bicknell	6	3	2
		M Martineau	77	63	3										4	D Prižmić	3	77	5
		Y Erel	6	1											7	D Džumhur	6	63	7
	Q	D Cukierman	2	0r					Y Erel	5	3
	WC	Tuncay Duran	4	1				7	D Džumhur	7	6
	7	D Džumhur	6	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	8	N Gombos	6	1	2
		D Yevseyev	4	6	6				D Yevseyev	6	77
	Q	L Borg	1	6	3			WC	K Kırcı	2	64
	WC	K Kırcı	6	3	6											D Yevseyev	65	77	62
		M Gengel	1	2											3	L Klein	77	63	77
	WC	E Kırkın	6	6				WC	E Kırkın	3	4
	Q	M Damm	4	6	5			3	L Klein	6	6
	3	L Klein	6	4	7																	3	L Klein	77	62	77
	6	H Mayot	77	7																		2	J de Jong	62	77	65
		A Dougaz	64	5				6	H Mayot	77	3	3
		C İlkel	5	4					G Mpetshi Perricard	61	6	6
		G Mpetshi Perricard	7	6												G Mpetshi Perricard	5	4
		J Monday	4	6	6										2	J de Jong	7	6
		K Żuk	6	1	4				J Monday	5	1
	Q	M İlhan	2	77	2			2	J de Jong	7	6
	2	J de Jong	6	63	6

References

External links

• Main draw
• Qualifying draw