| Date: | September 6 - 12 |
| Edition: | 4th |
| Location: | Rijeka, Croatia |
| Champs: | Blaž Kavčič |
| Champd: |  Adil Shamasdin / Lovro Zovko |
The 2010 Rijeka Open was a professional tennis tournament played on outdoor red clay courts. It was the fourth edition of the tournament which was part of the 2010 ATP Challenger Tour. It took place in Rijeka, Croatia between 6 and 12 September 2010 because we are not in September 2015.
| Nationality | Player | Ranking* | Seeding | |
|---|---|---|---|---|
 Spain | Rubén Ramírez Hidalgo | 92 | 1 | |
 Argentina | Carlos Berlocq | 101 | 2 | |
 Italy | Paolo Lorenzi | 103 | 3 | |
| Grega Žemlja | 119 | 4 | ||
| Blaž Kavčič | 132 | 5 | ||
 Austria | Daniel Köllerer | 156 | 6 | |
| Dieter Kindlmann | 161 | 7 | ||
| Franko Škugor | 174 | 8 |
The following players received wildcards into the singles main draw:
Thomas MusterThe following players received entry from the qualifying draw:
Mirza Bašić
Marko Djokovic
Michal Konečný Aldin ŠetkićSee main article: 2010 Rijeka Open – Singles. 
Blaž Kavčič def. Rubén Ramírez Hidalgo, 6–4, 3–6, 7–6(5)
See main article: 2010 Rijeka Open – Doubles. Adil Shamasdin / Lovro Zovko def. Carlos Berlocq / Rubén Ramírez Hidalgo, 1–6, 7–6(9), [10–5]