2021 IBG Prague Open
Date	23–29 August
Category	ATP Challenger Tour
Draw	32S / 16D
Surface	Clay
Location	Prague, Czech Republic
Champions
Singles
Franco Agamenone
Doubles
Victor Vlad Cornea / Petros Tsitsipas
← 2020 · IBG Prague Open · 2022 →

The 2021 IBG Prague Open was a professional tennis tournament played on clay courts. It was part of the 2021 ATP Challenger Tour. It took place in Prague, Czech Republic between 23 and 29 August 2021.

Singles main-draw entrants

Seeds

Country	Player	Rank1	Seed
RUS	Evgeny Karlovskiy	290	1
USA	Alexander Ritschard	300	2
RUS	Evgenii Tiurnev	310	3
FRA	Geoffrey Blancaneaux	311	4
CZE	Jonáš Forejtek	315	5
BEL	Michael Geerts	319	6
ROU	Filip Jianu	320	7
SRB	Miljan Zekić	324	8

• ¹ Rankings as of 16 August 2021.^[1]

Other entrants

The following players received wildcards into the singles main draw:

• Martin Krumich
• Andrew Paulson
• Daniel Siniakov

The following player received entry into the singles main draw using a protected ranking:

• Matteo Donati

The following players received entry from the qualifying draw:

• Facundo Díaz Acosta
• Uladzimir Ignatik
• Zsombor Piros
• Alex Rybakov

Champions

Singles

• Franco Agamenone def. Ryan Peniston 6–3, 6–1.

Doubles

• Victor Vlad Cornea / Petros Tsitsipas def. Martin Krumich / Andrew Paulson 6–3, 3–6, [10–8].