2021 Bucharest Challenger

The 2021 Bucharest Challenger was a professional tennis tournament played on clay courts. It was the 1st edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Bucharest, Romania between 20 and 26 September 2021.

Seeds

 * 1 Rankings are as of 13 September 2021.

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

The following players received entry into the singles main draw as alternates:
 * 🇷🇴 Filip Jianu
 * 🇷🇺 Alexey Vatutin

The following players received entry from the qualifying draw:
 * 🇮🇹 Matteo Arnaldi
 * 🇷🇺 Ivan Gakhov
 * 🇫🇷 Calvin Hemery
 * 🇸🇪 Dragoș Nicolae Mădăraș

Singles

 * 🇨🇿 Jiří Lehečka def. 🇸🇰 Filip Horanský 6–3, 6–2.

Doubles

 * Ruben Gonzales / 🇺🇸 Hunter Johnson def. 🇩🇪 Maximilian Marterer / 🇨🇿 Lukáš Rosol 1–6, 6–2, [10–3].