2021 Iași Open

The 2021 Iași Open was a professional tennis tournament played on clay courts. It was the second edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Iași, Romania between 12 and 18 July 2021.

Seeds

 * 1 Rankings as of 28 June 2021.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇷🇴 Cezar Crețu
 * 🇷🇴 David Ionel
 * 🇷🇴 Ștefan Paloși

The following player received entry into the singles main draw using a protected ranking:
 * 🇮🇹 Matteo Donati

The following player received entry into the singles main draw as an alternate:
 * 🇦🇷 Hernán Casanova

The following players received entry from the qualifying draw:
 * 🇧🇬 Alexandar Lazarov
 * 🇨🇿 David Poljak
 * 🇷🇴 Dan Alexandru Tomescu
 * 🇷🇸 Miljan Zekić

The following player received entry as a lucky loser:
 * 🇷🇺 Bogdan Bobrov

Singles

 * 🇨🇿 Zdeněk Kolář def. 🇫🇷 Hugo Gaston 7–5, 4–6, 6–4.

Doubles

 * 🇧🇷 Orlando Luz / 🇧🇷 Felipe Meligeni Alves def. 🇦🇷 Hernán Casanova / 🇪🇸 Roberto Ortega Olmedo 6–3, 6–4.