2011 St. Petersburg Open – Singles
| Singles | |
|---|---|
| 2011 St. Petersburg Open | |
| Champion |
 Marin Čilić
|
| Runner-up |
 Janko Tipsarević
|
| Final score | 6–3, 3–6, 6–2 |
Mikhail Kukushkin was the defending champion but lost to Michael Berrer in the first round.
Marin Čilić won the tournament beating Janko Tipsarević in the final, 6–3, 3–6, 6–2.
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