2021 Moneta Czech Open

The 2021 Moneta Czech Open was a professional tennis tournament played on clay courts. It was the 28th edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Prostějov, Czech Republic between 14 and 20 June 2021.

Seeds

 * 1 Rankings are as of 31 May 2021.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇨🇿 Andrew Paulson
 * 🇨🇿 Daniel Siniakov
 * 🇨🇿 Dalibor Svrčina

The following player received entry into the singles main draw using a protected ranking:
 * 🇷🇺 Andrey Kuznetsov

The following player received entry into the singles main draw as an alternate:
 * 🇨🇿 Jonáš Forejtek

The following players received entry from the qualifying draw:
 * 🇦🇹 Alexander Erler
 * 🇹🇳 Skander Mansouri
 * 🇨🇿 David Poljak
 * 🇺🇸 Alex Rybakov

The following players received entry as lucky losers:
 * 🇩🇪 Johannes Härteis
 * Jelle Sels

Singles

 * 🇦🇷 Federico Coria def. 🇸🇰 Alex Molčan 7–6(7–1), 6–3.

Doubles

 * 🇰🇿 Aleksandr Nedovyesov / Gonçalo Oliveira def. 🇨🇿 Roman Jebavý / 🇨🇿 Zdeněk Kolář 1–6, 7–6(7–5), [10–6].