| 2009 San Marino CEPU Open | |
|---|---|
| Date | August 3 – August 9 |
| Edition | 21st |
| Location | City of San Marino, San Marino |
| Champions | |
| Singles | |
 Andreas Seppi | |
| Doubles | |
 Lucas Arnold Ker / Sebastián Prieto | |
The 2009 San Marino CEPU Open was a professional tennis tournament played on outdoor red clay courts. It was the twenty-first edition of the tournament which was part of the Tretorn SERIE+ of the 2009 ATP Challenger Tour. It took place in City of San Marino, San Marino between 3 and 9 August 2009.
| Nationality | Player | Ranking* | Seeding |
|---|---|---|---|
| ITA
|
Andreas Seppi | 43 | 1 |
 ESP
|
Óscar Hernández | 72 | 2 |
 GER
|
Björn Phau | 78 | 3 |
 ROU
|
Victor Crivoi | 81 | 4 |
 AUT
|
Daniel Köllerer | 82 | 5 |
| ESP
|
Daniel Gimeno-Traver | 86 | 6 |
 BEL
|
Olivier Rochus | 87 | 7 |
| ESP
|
Alberto Martín | 100 | 8 |
The following players received wildcards into the singles main draw:
The following players received a Special Exempt into the main draw:
The following players received entry from the qualifying draw:
|
Main article: 2009 San Marino CEPU Open – Singles |
Andreas Seppi def. Potito Starace, 7–6(4), 2–6, 6–4
|
Main article: 2009 San Marino CEPU Open – Doubles |
Lucas Arnold Ker / Sebastián Prieto def. 
Johan Brunström / 
Jean-Julien Rojer, 7–6(4), 2–6, [10–7]
