2021 Tampere Open

Country	Player	Rank1	Seed
NED	Botic van de Zandschulp	132	1
SUI	Henri Laaksonen	134	2
FRA	Antoine Hoang	148	3
ESP	Mario Vilella Martínez	178	4
KAZ	Dmitry Popko	185	5
BEL	Kimmer Coppejans	191	6
FRA	Alexandre Müller	197	7
ARG	Guido Andreozzi	206	8

• ¹ Rankings as of 12 July 2021.^[1]

The following players received wildcards into the singles main draw:

• Leo Borg
• Patrik Niklas-Salminen
• Otto Virtanen

The following player received entry into the singles main draw as a special exempt:

• Mario Vilella Martínez

The following players received entry into the singles main draw as alternates:

• Jonáš Forejtek
• Orlando Luz

The following players received entry from the qualifying draw:

• Geoffrey Blancaneaux
• Bogdan Bobrov
• Arthur Cazaux
• Nicolás Kicker

The following players received entry as lucky losers:

• Alexander Erler
• Kyrian Jacquet

• Jiří Lehečka def. Nicolás Kicker 5–7, 6–4, 6–3.

• Pedro Cachin / Facundo Mena def. Orlando Luz / Felipe Meligeni Alves 7–5, 6–3.