2021 Kyiv Open

Country	Player	Rank1	Seed
ARG	Sebastián Báez	155	1
POR	Frederico Ferreira Silva	180	2
FRA	Quentin Halys	183	3
KAZ	Dmitry Popko	193	4
GBR	Jay Clarke	206	5
UKR	Sergiy Stakhovsky	227	6
FRA	Constant Lestienne	248	7
FRA	Tristan Lamasine	260	8

• ¹ Rankings are as of 30 August 2021.^[1]

The following players received wildcards into the singles main draw:

• Illya Beloborodko
• Oleksii Krutykh
• Richard Zusman

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

• Joris De Loore

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

• Alessandro Bega
• Ergi Kırkın

The following players received entry from the qualifying draw:

• Ivan Gakhov
• Georgii Kravchenko
• Alex Rybakov
• Clément Tabur

• Franco Agamenone def. Sebastián Báez 7–5, 6–2.

• Orlando Luz / Aleksandr Nedovyesov def. Denys Molchanov / Sergiy Stakhovsky 6–4, 6–4.