2023 Slovak Open – Men's singles

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

Men's singles
2023 Slovak Open
Champion	Gabriel Diallo
Runner-up	Joris De Loore
Score	6–0, 7–5

Main article: 2023 Slovak Open

Gabriel Diallo won the title after defeating Joris De Loore 6–0, 7–5 in the final.

Seeds

1. Dominic Thiem (second round)
2. Dominic Stricker (first round)
3. Benjamin Bonzi (first round)
4. Tomáš Macháč (withdrew)
5. Liam Broady (first round)
6. Zsombor Piros (second round)
7. Maxime Cressy (quarterfinals)
8. Alex Molčan (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
		Gabriel Diallo	77	6
	Q	Martin Damm	65	2
									Gabriel Diallo	6	7
									Joris De Loore	0	5
		Joris De Loore	7	77
		Luca Nardi	5	65

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	D Thiem	77	6
		V Sachko	65	3				1	D Thiem	1	6	65
		G Diallo	7	6					G Diallo	6	4	77
	SE	A Fery	5	1												G Diallo	3	77	6
		D Prižmić	0	3												L Klein	6	65	2
		L Klein	6	6					L Klein	6	6
		O Virtanen	77	1	6				O Virtanen	4	4
	5	L Broady	65	6	2																		G Diallo	77	6
	LL	A Santillan	3	6	3																	Q	M Damm	65	2
	Q	M Damm	6	3	6			Q	M Damm	6	6
	Q	K Ivanovski	77	6				Q	K Ivanovski	3	4
	Q	P Gojowczyk	63	2											Q	M Damm	6	78
	LL	M Martineau	4	6	6										7	M Cressy	4	66
		J Menšík	6	4	1			LL	M Martineau	64	3
	WC	Lukáš Pokorný	64	3				7	M Cressy	77	6
	7	M Cressy	77	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	8	A Molčan	7	4	3
		J De Loore	5	6	6				J De Loore	6	6
	SE	B Hassan	6	6				SE	B Hassan	3	4
		S Travaglia	3	2												J De Loore	6	3	77
	Q	D Novak	66	0											Q	I Marchenko	3	6	62
	Q	I Marchenko	78	6				Q	I Marchenko	4	6	7
	WC	N Gombos	6	77				WC	N Gombos	6	3	5
	3	B Bonzi	4	65																			J De Loore	7	77
	6	Z Piros	7	3	6																		L Nardi	5	65
		F Misolic	5	6	3			6	Z Piros	3	1
		G Zeppieri	2	0					D Džumhur	6	6
		D Džumhur	6	6												D Džumhur	3	0
	WC	A Paulson	6	6												L Nardi	6	6
	Q	GA Boitan	4	3				WC	A Paulson	7	4	3
		L Nardi	77	6					L Nardi	5	6	6
	2	D Stricker	64	3