2021 Split Open II

The 2021 Split Open II was a professional tennis tournament played on clay courts. It was part of the 2021 ATP Challenger Tour. It took place in Split, Croatia between 12 and 18 April 2021.

Seeds

 * Rankings are as of 5 April 2021.

Other entrants
The following players received wildcards into the singles main draw:
 * Duje Ajduković
 * Duje Kekez
 * Nino Serdarušić

The following players received entry into the singles main draw using protected rankings:
 * 🇩🇪 Dustin Brown
 * 🇦🇺 Thanasi Kokkinakis

The following players received entry into the singles main draw as special exempts:
 * 🇦🇷 Pedro Cachin
 * Blaž Kavčič

The following players received entry from the qualifying draw:
 * 🇧🇦 Mirza Bašić
 * 🇸🇰 Lukáš Klein
 * 🇨🇿 Zdeněk Kolář
 * 🇵🇱 Kacper Żuk

The following player received entry as a lucky loser:
 * 🇦🇷 Andrea Collarini

Singles

 * 🇵🇱 Kacper Żuk def. 🇫🇷 Mathias Bourgue 6–4, 6–2.

Doubles

 * 🇵🇱 Szymon Walków / 🇵🇱 Jan Zieliński def. 🇫🇷 Grégoire Barrère / 🇫🇷 Albano Olivetti 6–2, 7–5.