2023 AON Open Challenger – Singles

Thiago Monteiro was the defending champion^[1] but lost in the semifinals to Fabio Fognini.

Singles
2023 AON Open Challenger
Champion	Thiago Seyboth Wild
Runner-up	Fabio Fognini
Score	6–2, 7–6(7–3)

Main article: 2023 AON Open Challenger

Thiago Seyboth Wild won the title after defeating Fognini 6–2, 7–6^(7–3) in the final.

Seeds

1. Alexander Shevchenko (second round)
2. Federico Coria (quarterfinals)
3. Thiago Seyboth Wild (champion)
4. Zsombor Piros (quarterfinals)
5. Thiago Monteiro (semifinals)
6. Benoît Paire (first round)
7. Fabio Fognini (final)
8. Andrea Vavassori (semifinals, retired)

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	Thiago Monteiro	2	4
	7	Fabio Fognini	6	6
								7	Fabio Fognini	2	63
								3	Thiago Seyboth Wild	6	77
	3	Thiago Seyboth Wild	4
	8	Andrea Vavassori	3r

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	A Shevchenko	2	79	6
	WC	Marcello Serafini	6	67	3			1	A Shevchenko	6	5	1
	Q	C-h Tseng	6	6				Q	C-h Tseng	3	7	6
	Q	Federico Iannaccone	2	0											Q	C-h Tseng	2	1
		F Maestrelli	3	6	3										5	T Monteiro	6	6
	Q	L Rottoli	6	3	6			Q	L Rottoli	3	2
		S Travaglia	2	6	4			5	T Monteiro	6	6
	5	T Monteiro	6	1	6																	5	T Monteiro	2	4
	4	Z Piros	77	6																		7	F Fognini	6	6
		A Pellegrino	60	3				4	Z Piros	6	3	6
		K Jacquet	4	0					F Passaro	3	6	2
		F Passaro	6	6											4	Z Piros	4	4
		S Caruso	3	6	3										7	F Fognini	6	6
	Q	G Oradini	6	1	6			Q	G Oradini	0	3
		V Vacherot	5	4				7	F Fognini	6	6
	7	F Fognini	7	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	6	B Paire	77	4	3
	LL	M Zekić	62	6	6			LL	M Zekić	3	4
		M Gigante	3	1					S Napolitano	6	6
		S Napolitano	6	6												S Napolitano	5	3
	WC	E Dalla Valle	0	6	1										3	T Seyboth Wild	7	6
	Q	Andrea Picchione	6	1	6			Q	A Picchione	4	67
		R Bonadio	6	65	1			3	T Seyboth Wild	6	79
	3	T Seyboth Wild	4	77	6																	3	T Seyboth Wild	4
	8	A Vavassori	77	6																		8	A Vavassori	3r
		D Ajduković	63	2				8	A Vavassori	6	6
	WC	G Fonio	65	6	3				F Agamenone	1	2
		F Agamenone	77	4	6										8	A Vavassori	6	6
	Q	H Habib	6	77											2	F Coria	0	3
		ND Ionel	3	65				Q	H Habib	4	3
		N Serdarušić	5	4				2	F Coria	6	6
	2	F Coria	7	6