| Date: | August 17 – August 23 |
| Edition: | 2nd |
| Location: | San Sebastián, Spain |
| Champs: | Thiemo de Bakker |
| Champd: |  Jonathan Eysseric / Romain Jouan |
The 2009 Concurso Internacional de Tenis – San Sebastián was a professional tennis tournament played on outdoor red clay courts. It was the second edition of the tournament which was part of the 2009 ATP Challenger Tour. It took place in San Sebastián, Spain between 17 and 23 August 2009.
| Nationality | Player | Ranking* | Seeding | |
|---|---|---|---|---|
 Spain | Rubén Ramírez Hidalgo | 99 | 1 | |
| Spain | Santiago Ventura | 109 | 2 | |
| Spain | Pablo Andújar | 120 | 3 | |
| Lamine Ouahab | 122 | 4 | ||
| France | Olivier Patience | 179 | 5 | |
| Thiemo de Bakker | 207 | 6 | ||
| Spain | David Marrero | 215 | 7 | |
| Spain | Pablo Santos | 219 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
Adam Chadaj Pedro Clar-Rosselló
Federico del Bonis Javier Genaro-MartínezSee main article: 2009 Concurso Internacional de Tenis – San Sebastián – Singles. Thiemo de Bakker def. 
Filip Krajinović, 6–2, 6–3
See main article: 2009 Concurso Internacional de Tenis – San Sebastián – Doubles. Jonathan Eysseric / Romain Jouan def. Pedro Clar-Rosselló / Albert Ramos-Viñolas, 7–5, 6–3