| 2011 San Marino CEPU Open | |
|---|---|
| Date | 8–14 August |
| Edition | 24th |
| Location | City of San Marino, San Marino |
| Champions | |
| Singles | |
 Potito Starace | |
| Doubles | |
 James Cerretani /  Philipp Marx | |
The 2011 San Marino CEPU Open was a professional tennis tournament played on clay courts. It was the 24th edition of the tournament which was part of the Tretorn SERIE+ of the 2011 ATP Challenger Tour. It took place in City of San Marino, San Marino between 8 and 14 August 2011.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| ITA | Potito Starace | 63 | 1 |
 CZE | Lukáš Rosol | 69 | 2 |
| ITA | Filippo Volandri | 73 | 3 |
 ESP | Pere Riba | 77 | 4 |
 POR | Rui Machado | 84 | 5 |
 FRA | Marc Gicquel | 101 | 6 |
| GER | Mischa Zverev | 115 | 7 |
| FRA | Benoît Paire | 117 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry as a special exempt into the singles main draw:
The following players received entry from the qualifying draw:
Potito Starace def. 
Martin Kližan, 6–1, 3–0, retired
James Cerretani / Philipp Marx def. Daniele Bracciali / 
Julian Knowle, 6–3, 6–4
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