# 2000 Gelsor Open Romania – Singles

Alberto Martín was the defending champion but lost in the quarterfinals to Markus Hantschk.
Joan Balcells won in the final 6–4, 3–6, 7–6$^{(7–1)}$ against Hantschk.

## Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
* Mariano Puerta (second round)
* Karim Alami (first round)
* Stefan Koubek (first round)
* Francisco Clavet (first round)
* Magnus Gustafsson (second round)
* Alberto Martín (quarterfinals)
* Albert Portas (quarterfinals)
* Álex Calatrava (semifinals)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking
| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Mariano Puerta | 6 | 6 | | | | | | | | | | | | | | | | | | | |
| WC | Răzvan Sabău | 2 | 2 | | 1 | Mariano Puerta | 4 | 4 | | | | | | | | | | | | | | |
| Q | Alexandre Simoni | 2 | 4 | | | Joan Balcells | 6 | 6 | | | | | | | | | | | | | | |
| | Joan Balcells | 6 | 6 | | | | | | | | Joan Balcells | 7 | 4 | 6 | | | | | | | | |
| | Gastón Etlis | 6 | 3 | 2 | | | | | | 7 | Albert Portas | 5 | 6 | 2 | | | | | | | | |
| | Sergi Bruguera | 4 | 6 | 6 | | Sergi Bruguera | 4 | 6$^4$ | | | | | | | | | | | | | | |
| | Richard Fromberg | 5 | 3 | | 7 | Albert Portas | 6 | 7$^7$ | | | | | | | | | | | | | | |
| 7 | Albert Portas | 7 | 6 | | | | | | | | | | | | | Joan Balcells | 6 | 6 | | | | |
| 3 | Stefan Koubek | 5 | 0 | | | | | | | | | | | | Q | Marc-Kevin Goellner | 4 | 4 | | | | |
| | Julián Alonso | 7 | 6 | | | Julián Alonso | 2 | 2 | | | | | | | | | | | | | | |
| | Orlin Stanoytchev | 5 | 3 | | | Galo Blanco | 6 | 6 | | | | | | | | | | | | | | |
| | Galo Blanco | 7 | 6 | | | | | | | | Galo Blanco | 2 | 6 | 4 | | | | | | | | |
| | Daniel Elsner | 6 | 1 | 0 | | | | | | Q | Marc-Kevin Goellner | 6 | 3 | 6 | | | | | | | | |
| Q | Marc-Kevin Goellner | 4 | 6 | 6 | Q | Marc-Kevin Goellner | 7 | 7$^7$ | | | | | | | | | | | | | | |
| WC | Ionuț Moldovan | 5 | 4 | | 5 | Magnus Gustafsson | 5 | 6$^5$ | | | | | | | | | | | | | | |
| 5 | Magnus Gustafsson | 7 | 6 | | | | | | | | | | | | | | | | Joan Balcells | 6 | 3 | 7$^7$ |
| 6 | Alberto Martín | 6 | 6 | | | | | | | | | | | | | | | | Markus Hantschk | 3 | 6 | 6$^1$ |
| | Juan Antonio Marín | 4 | 0 | | 6 | Alberto Martín | 0 | 6 | 6 | | | | | | | | | | | | | |
| | Christophe Rochus | 6 | 6 | | | Christophe Rochus | 6 | 4 | 4 | | | | | | | | | | | | | |
| | David Sánchez | 2 | 3 | | | | | | | 6 | Alberto Martín | 1 | 6 | 2 | | | | | | | | |
| | Adrian Voinea | 3 | 3 | | | | | | | | Markus Hantschk | 6 | 4 | 6 | | | | | | | | |
| | Markus Hantschk | 6 | 6 | | | Markus Hantschk | 6 | 6 | | | | | | | | | | | | | | |
| WC | Dinu Pescariu | 4 | 6 | 6 | WC | Dinu Pescariu | 3 | 2 | | | | | | | | | | | | | | |
| 4 | Francisco Clavet | 6 | 3 | 4 | | | | | | | | | | | | Markus Hantschk | 6 | 6 | | | | |
| 8 | Álex Calatrava | 6 | 6 | | | | | | | | | | | | 8 | Álex Calatrava | 4 | 1 | | | | |
| | Hernán Gumy | 3 | 1 | | 8 | Álex Calatrava | 6 | 3 | 7 | | | | | | | | | | | | | |
| | Emilio Benfele Álvarez | 6$^3$ | 3 | | | Jens Knippschild | 2 | 6 | 5 | | | | | | | | | | | | | |
| | Jens Knippschild | 7$^7$ | 6 | | | | | | | 8 | Álex Calatrava | 6 | 4 | | | | | | | | | |
| Q | Jakub Herm-Zahlava | 1 | 3 | | | | | | | | Fernando Meligeni | 3 | 0 | r | | | | | | | | |
| Q | Michael Kohlmann | 6 | 6 | | Q | Michael Kohlmann | 1 | r | | | | | | | | | | | | | | |
| | Fernando Meligeni | 7 | 6 | | | Fernando Meligeni | 4 | | | | | | | | | | | | | | | |
| 2 | Karim Alami | 5 | 3 | | | | | | | | | | | | | | | | | | | |