2021 Split Open

The 2021 Split Open 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 5 and 11 April 2021.

Seeds

 * Rankings are as of 22 March 2021.

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

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

The following player received entry into the singles main draw as a special exempt:
 * 🇨🇿 Zdeněk Kolář

The following player received entry into the singles main draw as an alternate:
 * 🇵🇱 Kacper Żuk

The following players received entry from the qualifying draw:
 * 🇧🇦 Mirza Bašić
 * 🇧🇾 Uladzimir Ignatik
 * Blaž Kavčič
 * 🇦🇺 Akira Santillan

Singles

 * Blaž Rola def. Blaž Kavčič 2–6, 6–3, 6–2.

Doubles

 * 🇰🇿 Andrey Golubev / 🇰🇿 Aleksandr Nedovyesov def. 🇵🇱 Szymon Walków / 🇵🇱 Jan Zieliński 7–5, 6–7(5–7), [10–5].