2021 Sibiu Open

The 2021 Sibiu Open was a professional tennis tournament played on clay courts. It was the tenth edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Sibiu, Romania between 27 September and 3 October 2021.

2021 Sibiu Open
Date	27 September – 3 October
Edition	10th
Location	Sibiu, Romania
Champions
Singles
Stefano Travaglia
Doubles
Alexander Erler / Lucas Miedler

Singles main-draw entrants

Seeds

Country	Player	Rank1	Seed
ITA	Stefano Travaglia	98	1
MDA	Radu Albot	104	2
SVK	Alex Molčan	118	3
BIH	Damir Džumhur	129	4
CZE	Zdeněk Kolář	149	5
SUI	Marc-Andrea Hüsler	159	6
AUS	Thanasi Kokkinakis	183	7
IND	Sumit Nagal	185	8

• ¹ Rankings are as of 20 September 2021.^[1]

Other entrants

The following players received wildcards into the singles main draw:

• Victor Vlad Cornea
• Vlad Andrei Dancu
• Petros Tsitsipas

The following players received entry from the qualifying draw:

• Yan Bondarevskiy
• David Ionel
• Yshai Oliel
• Ștefan Paloși

The following player received entry as a lucky loser:

• Elmar Ejupovic

Champions

Singles

Main article: 2021 Sibiu Open – Singles

• Stefano Travaglia def. Thanasi Kokkinakis 7–6^(7–4), 6–2.

Doubles

Main article: 2021 Sibiu Open – Doubles

• Alexander Erler / Lucas Miedler def. James Cerretani / Luca Margaroli 6–3, 6–1.