The 2020 Split Open was a professional tennis tournament played on clay courts. It was part of the 2020 ATP Challenger Tour. It took place in Split, Croatia between 28 September and 4 October 2020.
Singles main-draw entrants
Seeds
Rankings are as of 21 September 2020.
Other entrants
The following players received wildcards into the singles main draw: Duje Ajduković Borna Gojo Nino Serdarušić
The following player received entry into the singles main draw as a special exempt: Tomás Martín Etcheverry
The following player received entry into the singles main draw using a protected ranking: Maximilian Marterer
The following players received entry from the qualifying draw: Marcelo Tomás Barrios Vera Altuğ Çelikbilek Malek Jaziri Peđa Krstin
Champions
Singles
Francisco Cerúndolo def. Pedro Sousa 4–6, 6–3, 7–6(7–4).
Doubles
Treat Huey / Nathaniel Lammons def. André Göransson / Hunter Reese 6–4, 7–6(7–3).