2023 Nonthaburi Challenger III – Singles

Arthur Cazaux was the defending champion^[1] but lost in the final to Sho Shimabukuro.

Singles
2023 Nonthaburi Challenger III
Champion	Sho Shimabukuro
Runner-up	Arthur Cazaux
Score	6–2, 7–5

Main article: 2023 Nonthaburi Challenger III

Shimabukuro won the title after defeating Cazaux 6–2, 7–5 in the final.

Seeds

1. James Duckworth (second round)
2. Alexander Ritschard (first round)
3. Antoine Escoffier (quarterfinals, retired)
4. Evan Furness (first round)
5. Paul Jubb (first round)
6. Nicholas David Ionel (first round)
7. Peter Gojowczyk (withdrew)
8. Zdeněk Kolář (quarterfinals)

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
		Sho Shimabukuro	6	7
		Hong Seong-chan	2	5
									Sho Shimabukuro	6	7
								Q	Arthur Cazaux	2	5
	LL	Giovanni Fonio	5	3
	Q	Arthur Cazaux	7	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	J Duckworth	6	6
	Alt	B Zhukayev	3	4				1	J Duckworth	64	6	1
		S Shimabukuro	6	6					S Shimabukuro	77	4	6
		M Moraing	3	2												S Shimabukuro	6	67	6
		J Choinski	6	6											8	Z Kolář	0	79	2
	WC	J Navasirisomboon	1	3					J Choinski	4	6	0
	Q	E Donskoy	6	67	2			8	Z Kolář	6	3	6
	8	Z Kolář	3	79	6																		S Shimabukuro	6	7
	4	E Furness	1	1																			S-c Hong	2	5
		K Żuk	6	6					K Żuk	3	4
	WC	Y Charoenphon	3	1					M Geerts	6	6
		M Geerts	6	6												M Geerts	1	5
		S-c Hong	6	6												S-c Hong	6	7
	WC	K Samrej	4	4					S-c Hong	6	77
		NH Lý	6	77					NH Lý	2	63
	6	ND Ionel	1	65

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	LL	G Fonio	6	7
		D Yevseyev	2	5				LL	G Fonio	64	6	6
		H Moriya	0	4					B Hassan	77	4	2
		B Hassan	6	6											LL	G Fonio	7	65	2
		D Michalski	6	6											3	A Escoffier	5	77	1r
	Q	Dominik Palán	4	2					D Michalski	3	6	1
	Alt	S Travaglia	1	64				3	A Escoffier	6	4	6
	3	A Escoffier	6	77																		LL	G Fonio	5	3
	5	P Jubb	6	4	5																	Q	A Cazaux	7	6
	Q	S Mochizuki	2	6	7			Q	S Mochizuki	3	1
		D Added	6	4	1				T Sandgren	6	6
		T Sandgren	1	6	6											T Sandgren	64	4
	Q	A Cazaux	77	6											Q	A Cazaux	77	6
	Q	S Parker	61	4				Q	A Cazaux	6	6
	Q	J Menšík	77	7				Q	J Menšík	3	0
	2	A Ritschard	65	5