2023 Sparkassen ATP Challenger – Singles

Borna Gojo was the defending champion but chose not to defend his title.

Singles
2023 Sparkassen ATP Challenger
Champion	Lukáš Klein
Runner-up	Maks Kaśnikowski
Score	6–7(4–7), 7–6(7–4), 7–6(8–6)

Main article: 2023 Sparkassen ATP Challenger

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

Seeds

1. Abdullah Shelbayh (second round)
2. Gauthier Onclin (first round)
3. Federico Gaio (semifinals)
4. Francesco Maestrelli (first round)
5. Mark Lajal (second round)
6. Alejandro Moro Cañas (first round)
7. Stefano Napolitano (first round)
8. Illya Marchenko (second round)

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• SE = Special exempt
• PR = Protected ranking
• ITF = ITF entry
• JE = Junior exempt
• w/o = Walkover
• r = Retired
• d = Defaulted
• SR = Special ranking

Finals

	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

Top half

	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	Enrico 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

Bottom half

	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

External links

• Main draw
• Qualifying draw