2021 Tampere Open

The 2021 Tampere Open was a professional tennis tournament played on clay courts. It was the 39th edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Tampere, Finland, on 19–25 July 2021.

Seeds

 * 1 Rankings as of 12 July 2021.

Other entrants
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

Singles

 * 🇨🇿 Jiří Lehečka def. 🇦🇷 Nicolás Kicker 5–7, 6–4, 6–3.

Doubles

 * 🇦🇷 Pedro Cachin / 🇦🇷 Facundo Mena def. 🇧🇷 Orlando Luz / 🇧🇷 Felipe Meligeni Alves 7–5, 6–3.