Singles
2021 Lošinj Open
Final
Champion	Carlos Taberner
Runner-up	Marco Cecchinato
Score	Walkover
Events
Singles Doubles
Lošinj Open · 2022 →

This was the first edition of the tournament.^[1]

Carlos Taberner won the title by walkover after Marco Cecchinato withdrew before the final.

	Semifinals							Final
	1	Marco Cecchinato	6	77
		Nerman Fatić	3	64
								1	Marco Cecchinato
								2	Carlos Taberner	w/o
	6	Alessandro Giannessi	4	3
	2	Carlos Taberner	6	6

	First round							Second round							Quarterfinals							Semifinals
	1	M Cecchinato	77	77
	Alt	Á López San Martín	65	62				1	M Cecchinato	64	77	6
		M Guinard	6	3	4				N Serdarušić	77	64	1
		N Serdarušić	2	6	6										1	M Cecchinato	6	2	7
	Alt	A Šetkić	6	6											8	M Bourgue	0	6	5
	WC	Anthony Genov	3	4				Alt	A Šetkić	0	2
		D Petrović	2r					8	M Bourgue	6	6
	8	M Bourgue	5																			1	M Cecchinato	6	77
	3	A Martin	77	6																			N Fatić	3	64
	WC	M Poljičak	62	3				3	A Martin	1	611
	Q	F Misolic	6	6				Q	F Misolic	6	713
	Q	A Kadhe	1	2											Q	F Misolic	66	2
	Q	N Álvarez Varona	5	2												N Fatić	78	6
		N Fatić	7	6					N Fatić	6	2	6
	Q	Georgii Kravchenko	6	6				Q	G Kravchenko	3	6	3
	5	B Rola	4	2

	First round							Second round							Quarterfinals							Semifinals
	6	A Giannessi	77	7
		R Haase	64	5				6	A Giannessi	79	3	6
		D Ajduković	62	0					F Agamenone	67	6	1
		F Agamenone	77	6											6	A Giannessi	6	66	6
	Alt	R Brancaccio	6	3	6										Alt	R Brancaccio	3	78	1
		E Kırkın	3	6	2			Alt	R Brancaccio	6	6
		C Gimeno Valero	6	6					C Gimeno Valero	4	1
	4	N Milojević	3	1																		6	A Giannessi	4	3
	7	J Clarke	3	6	3																	2	C Taberner	6	6
		A Arnaboldi	6	3	6				A Arnaboldi	6	3	6
		J Forejtek	6	6					J Forejtek	3	6	4
	WC	VV Cornea	4	4												A Arnaboldi	2	0
		G Blancaneaux	6	6											2	C Taberner	6	6
		FC Jianu	2	3					G Blancaneaux	61	6	1
		J Barranco Cosano	4	3				2	C Taberner	77	3	6
	2	C Taberner	6	6

• Main draw
• Qualifying draw