The 2021 Zagreb Open was a professional tennis tournament played on clay courts. It was part of the 2021 ATP Challenger Tour. It took place in Zagreb, Croatia between 10 and 16 May 2021.

Singles main-draw entrants Seeds Country Player Rank1 SeedFederico Coria921Pedro Martínez952Andrej Martin1093Yasutaka Uchiyama1104Pedro Sousa1135Benjamin Bonzi1156Damir Džumhur1187Thiago Seyboth Wild1268 Rankings are as of 3 May 2021.

Other entrants The following players received wildcards into the singles main draw: Borna Gojo Nino Serdarušić Antun Vidak

The following player received entry into the singles main draw as an alternate: Dmitry Popko

The following players received entry from the qualifying draw: Sebastián Báez Marcelo Tomás Barrios Vera Ernests Gulbis Ramkumar Ramanathan

Champions Singles

Sebastián Báez def. Juan Pablo Varillas 3–6, 6–3, 6–1.

Doubles

Evan King / Hunter Reese def. Andrey Golubev / Aleksandr Nedovyesov 6–2, 7–6(7–4).

References