2023 Sparkassen ATP Challenger – Singles

Singles
2023 Sparkassen ATP Challenger
Final
Champion	Lukáš Klein
Runner-up	Maks Kaśnikowski
Score	6–7(4–7), 7–6(7–4), 7–6(8–6)
Events
Singles Doubles
← 2022 · Sparkassen ATP Challenger · 2024 →

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

Lukáš Klein won the title after defeating Maks Kaśnikowski 6–7^(4–7), 7–6^(7–4), 7–6^(8–6) in the final.

	Semifinals							Final
	Q	Lukáš Klein	6	77
		Billy Harris	3	65
								Q	Lukáš Klein	64	77	78
									Maks Kaśnikowski	77	64	66
	3	Federico Gaio	3	7	2
		Maks Kaśnikowski	6	5	6

	First round							Second round							Quarterfinals							Semifinals
	1	A Shelbayh	6	6
		M Efstathiou	1	2				1	A Shelbayh	6	3	4
		Y Demin	63	4				Alt	E Dalla Valle	4	6	6
	Alt	E Dalla Valle	77	6											Alt	E Dalla Valle	3	2
	Alt	A Paulson	5	4											Q	L Klein	6	6
	Q	L Klein	7	6				Q	L Klein	77	77
	Q	M Bašić	77	6				Q	M Bašić	65	63
	6	A Moro Cañas	63	3																		Q	L Klein	6	77
	4	F Maestrelli	6	64	1																		B Harris	3	65
		A Bellier	4	77	6				A Bellier	4	4
	Q	Ryan Nijboer	3	67				Q	D Glinka	6	6
	Q	D Glinka	6	79											Q	D Glinka	63	6	3
	Q	Hynek Bartoň	65	77	6											B Harris	77	4	6
		D Jordà Sanchis	77	64	3			Q	H Bartoň	2	63
		B Harris	7	6					B Harris	6	77
	7	S Napolitano	5	3

	First round							Second round							Quarterfinals							Semifinals
	8	I Marchenko	6	6
	WC	L Rottoli	4	4				8	I Marchenko	6	2	65
	Q	Luca Giacomini	6	6				Q	L Giacomini	4	6	77
		L Wessels	3	4											Q	L Giacomini	63	62
	WC	F Forti	77	6											3	F Gaio	77	77
		N Gombos	65	4				WC	F Forti	6	3	3
		M Neuchrist	4	4				3	F Gaio	3	6	6
	3	F Gaio	6	6																		3	F Gaio	3	7	2
	5	M Lajal	6	6																			M Kaśnikowski	6	5	6
		K Żuk	3	4				5	M Lajal	6	4	2
		M Bourgue	6	66	6				M Bourgue	3	6	6
		J Sousa	3	78	4											M Bourgue	63	3
		M Geerts	6	6												M Kaśnikowski	77	6
	WC	Lorenzo Carboni	4	1					M Geerts	7	3	64
		M Kaśnikowski	6	6					M Kaśnikowski	5	6	77
	2	G Onclin	1	4

• Main draw
• Qualifying draw