Singles
2021 Internazionali di Tennis Città di Trieste
Champion	Tomás Martín Etcheverry
Runner-up	Thiago Agustín Tirante
Score	6–1, 6–1

Carlos Alcaraz was the defending champion^[1] but chose not to defend his title.

Tomás Martín Etcheverry won the title after defeating Thiago Agustín Tirante 6–1, 6–1 in the final.

Seeds

Draw

Finals

	Semifinals							Final
	1	Damir Džumhur	3	3
	Q	Thiago Agustín Tirante	6	6
								Q	Thiago Agustín Tirante	1	1
								3	Tomás Martín Etcheverry	6	6
	3	Tomás Martín Etcheverry	7	7
	Q	Timofey Skatov	5	5

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	D Džumhur	6	7
		A Collarini	0	5				1	D Džumhur	6	6
		P Krstin	6	6					P Krstin	3	1
	Q	V Durasovic	3	2											1	D Džumhur	6	6
		G Zeppieri	3	6	6										7	M Marterer	4	4
	Q	P Sakamoto	6	3	3				G Zeppieri	4	6	64
	WC	L Nardi	3	4				7	M Marterer	6	4	77
	7	M Marterer	6	6																		1	D Džumhur	3	3
	Q	TA Tirante	6	6																		Q	TA Tirante	6	6
		A Pellegrino	3	1				Q	TA Tirante	6	6
		N Serdarušić	3	3					R Bonadio	4	2
		R Bonadio	6	6											Q	TA Tirante	7	6
		D Ajduković	7	3	3										LL	O Luz	5	4
	PR	J Lenz	5	6	6			PR	J Lenz	5	0
	LL	O Luz	4					LL	O Luz	7	6
	6	M Trungelliti	2r

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	5	A Giannessi	4	6	6
		R Molleker	6	2	1			5	A Giannessi	710	4	0
		GM Moroni	2	66					V Sachko	68	6	6
		V Sachko	6	78												V Sachko	4	4
		A Arnaboldi	63	1											3	TM Etcheverry	6	6
	WC	R Haase	77	6				WC	R Haase	6	0	4
		C Ugo Carabelli	3	5				3	TM Etcheverry	4	6	6
	3	TM Etcheverry	6	7																		3	TM Etcheverry	7	7
	8	T Fabbiano	3	4																		Q	T Skatov	5	5
		L Giustino	6	6					L Giustino	6	2	1
	Q	T Skatov	7	5	6			Q	T Skatov	1	6	6
		D Stricker	5	7	4										Q	T Skatov	65	6	78
	WC	F Cobolli	78	6											WC	F Cobolli	77	1	66
		M Vrbenský	66	3				WC	F Cobolli	6	6
		F Meligeni Alves	77	63	1			2	A Hoang	2	1
	2	A Hoang	65	77	6

References

External links

• Main draw
• Qualifying draw