2023 BOSS Open – Singles

Frances Tiafoe defeated Jan-Lennard Struff in the final, 4–6, 7–6^(7–1), 7–6^(10–8) to win the singles title at the 2023 Stuttgart Open. It was his third ATP Tour title, and his first on grass courts (following titles on hardcourts and clay courts). Tiafoe saved a championship point en route to the title, in the final-set tiebreak. By winning the title, Tiafoe debuted in the top ten of the ATP rankings for the first time in his career.

Singles
2023 BOSS Open
Champion	Frances Tiafoe
Runner-up	Jan-Lennard Struff
Score	4–6, 7–6(7–1), 7–6(10–8)
Draw	28 (4 Q / 3 WC )
Seeds	8

Main article: 2023 BOSS Open

Matteo Berrettini was the defending champion,^[1] but lost in the first round to Lorenzo Sonego.^[2]

Seeds

The top four seeds received a bye into the second round.

1. Stefanos Tsitsipas (second round)
2. Taylor Fritz (quarterfinals)
3. Frances Tiafoe (champion)
4. Hubert Hurkacz (semifinals)
5. Tommy Paul (second round)
6. Lorenzo Musetti (quarterfinals)
7. Matteo Berrettini (first round)
8. Nick Kyrgios (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
		Jan-Lennard Struff	3	6	6
	4	Hubert Hurkacz	6	3	3
									Jan-Lennard Struff	6	61	68
								3	Frances Tiafoe	4	77	710
	3	Frances Tiafoe	6	713
	Q	Márton Fucsovics	3	611

Top half

	First round							Second round							Quarterfinals							Semifinals
								1/WC	S Tsitsipas	68	6	5
		R Gasquet	77	6					R Gasquet	710	2	7
	Q	C Eubanks	62	4												R Gasquet	4	5
		Z Zhang	1	4												J-L Struff	6	7
		J-L Struff	6	6					J-L Struff	77	77
		B Bonzi	3	4				5	T Paul	64	65
	5	T Paul	6	6																			J-L Struff	3	6	6
																						4	H Hurkacz	6	3	3
								4	H Hurkacz	4	77	77
	WC	F López	65	3				Q	Y Watanuki	6	65	65
	Q	Y Watanuki	77	6											4	H Hurkacz	6	6
		C O'Connell	6	6												C O'Connell	4	4
		D Altmaier	3	1					C O'Connell	77	6
		L Sonego	6	6					L Sonego	65	3
	7	M Berrettini	1	2

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	6	L Musetti	77	6
	Q	B Gojo	64	3				6	L Musetti	6	6
		G Barrère	6	6					G Barrère	3	3
	WC	O Otte	4	3											6	L Musetti	78	64	2
		M Giron	6	3	4										3	F Tiafoe	66	77	6
		J Lehečka	4	6	6				J Lehečka	62	4
								3	F Tiafoe	77	6
																						3	F Tiafoe	6	713
	8	N Kyrgios	5	3																		Q	M Fucsovics	3	611
		Y Wu	7	6					Y Wu	4	6	4
		D Shapovalov	6	3	4			Q	M Fucsovics	6	4	6
	Q	M Fucsovics	3	6	6										Q	M Fucsovics	6	7
		C Moutet	60	710	5										2	T Fritz	4	5
		A Karatsev	77	68	7				A Karatsev	64	3
								2	T Fritz	77	6

Qualifying

Seeds

1. Christopher Eubanks (qualified)
2. Márton Fucsovics (qualified)
3. Roman Safiullin (first round)
4. Borna Gojo (qualified)
5. Radu Albot (qualifying competition)
6. Yosuke Watanuki (qualified)
7. Antoine Bellier (qualifying competition)
8. Altuğ Çelikbilek (qualifying competition)

Qualifiers

1. Christopher Eubanks
2. Márton Fucsovics
3. Yosuke Watanuki
4. Borna Gojo

Qualifying draw

First qualifier

	First round							Qualifying competition
	1	Christopher Eubanks	4	6	6
	Alt	Benjamin Lock	6	4	2
								1	Christopher Eubanks	77	77
								5	Radu Albot	65	63
	Alt	Hugo Gaston	2	0
	5	Radu Albot	6	6

Second qualifier

	First round							Qualifying competition
	2	Márton Fucsovics	6	6
		Louis Wessels	3	1
								2	Márton Fucsovics	6	6
								8	Altuğ Çelikbilek	4	4
	Alt	Max Hans Rehberg	1	4
	8	Altuğ Çelikbilek	6	6

Third qualifier

	First round							Qualifying competition
	3	Roman Safiullin	65	4
		Benjamin Hassan	77	6
									Benjamin Hassan	5	4
								6	Yosuke Watanuki	7	6
		Henri Squire	6	5	3
	6	Yosuke Watanuki	4	7	6

Fourth qualifier

	First round							Qualifying competition
	4	Borna Gojo	64	6	6
	Alt	Mats Rosenkranz	77	4	4
								4	Borna Gojo	5	77	6
								7	Antoine Bellier	7	62	4
		Vladyslav Orlov	3	4
	7	Antoine Bellier	6	6