The 2019 Sibiu Open was a professional tennis tournament played on clay courts. It was the eighth edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Sibiu, Romania between 16 and 22 September 2019.

Singles main-draw entrants

Seeds

CountryPlayerRank1Seed
PORPedro Sousa1231
SLOBlaž Rola1332
HUNAttila Balázs1363
ESPPedro Martínez1494
SRBNikola Milojević1515
ARGFederico Coria1556
NEDRobin Haase1567
GERRudolf Molleker1578
PORJoão Domingues1799
ARGFacundo Argüello18110
NEDTallon Griekspoor18711
SVKFilip Horanský18912
KAZDmitry Popko21613
AUSChristopher O'Connell22314
SRBPeđa Krstin22415
ESPBernabé Zapata Miralles23616
  • 1 Rankings are as of 9 September 2019.

Other entrants

The following players received wildcards into the singles main draw:

The following players received entry into the singles main draw as alternates:

The following players received entry from the qualifying draw:

The following player received entry as a lucky loser:

Champions

Singles

Doubles