2023 Swiss Open Gstaad – Singles

Pedro Cachin defeated Albert Ramos Viñolas in the final, 3–6, 6–0, 7–5 to win the singles tennis title at the 2023 Swiss Open Gstaad. It was his first ATP Tour singles title.

Casper Ruud was the two-time reigning champion,^[1] but chose to compete in Båstad instead.^[2]

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

	Semifinals							Final
		Pedro Cachin	6	6
	Q	Hamad Medjedovic	3	1
									Pedro Cachin	3	6	7
									Albert Ramos Viñolas	6	0	5
		Albert Ramos Viñolas	6	6
	2	Miomir Kecmanović	2	3

	First round							Second round							Quarterfinals							Semifinals
								1	R Bautista Agut	64	63
		P Cachin	6	6					P Cachin	77	77
		T Daniel	4	1												P Cachin	6	6
		J Munar	6	6												J Munar	3	3
	WC	A Ritschard	3	3					J Munar	77	6
		S Wawrinka	6	3					S Wawrinka	63	1
	6	R Carballés Baena	1	1r																			P Cachin	6	6
																						Q	H Medjedovic	3	1
								4	Y Hanfmann	4	6	7
		B Bonzi	3	4					D Altmaier	6	2	5
		D Altmaier	6	6											4	Y Hanfmann	3	3
		A Müller	1	64											Q	H Medjedovic	6	6
		D Thiem	6	77					D Thiem	5	6	3
	Q	H Medjedovic	4	6	6			Q	H Medjedovic	7	2	6
	5	Z Zhang	6	1	4

	First round							Second round							Quarterfinals							Semifinals
	LL	O Virtanen	2	3
		JP Varillas	6	6					JP Varillas	6	6
		A Rinderknech	2	6	3			Q	F Bagnis	2	1
	Q	F Bagnis	6	2	6											JP Varillas	77	1	4
		A Ramos Viñolas	6	2	6											A Ramos Viñolas	62	6	6
	WC	F Fognini	1	6	2				A Ramos Viñolas	6	3	6
								3	L Sonego	3	6	4
																							A Ramos Viñolas	6	6
	8	L Djere	0	6	3																	2	M Kecmanović	2	3
	Q	Z Bergs	6	4	6			Q	Z Bergs	710	4	77
		M-A Hüsler	3	5				Q	J Rodionov	68	6	64
	Q	J Rodionov	6	7											Q	Z Bergs	4	6	5
		A Fils	64	64											2	M Kecmanović	6	3	7
	WC	D Stricker	77	77				WC	D Stricker	64	1
								2	M Kecmanović	77	6

	First round							Qualifying competition
	1	Jurij Rodionov	6	77
	WC	Mika Brunold	1	61
								1	Jurij Rodionov	6	6
									Maximilian Neuchrist	3	4
		Maximilian Neuchrist	6	6
	7	Ivan Gakhov	3	3

	First round							Qualifying competition
	2	Facundo Bagnis	77	6
	WC	Kilian Feldbausch	63	3
								2	Facundo Bagnis	6	6
									Geoffrey Blancaneaux	3	2
		Geoffrey Blancaneaux	6	6
	6	Raúl Brancaccio	4	3

	First round							Qualifying competition
	3	Otto Virtanen	6	77
		Alexander Weis	3	64
								3	Otto Virtanen	65	4
								8	Hamad Medjedovic	77	6
		Federico Gaio	3	64
	8	Hamad Medjedovic	6	77

	First round							Qualifying competition
	4	Thiago Seyboth Wild	6	2	64
		Zizou Bergs	3	6	77
									Zizou Bergs	6	6
									Marco Trungelliti	3	4
		Marco Trungelliti	6	6
	5	Thiago Agustín Tirante	3	3

• Main draw
• Qualifying draw