2018 Open Harmonie mutuelle
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| 2018 Open Harmonie mutuelle | |
|---|---|
| Date | 26 March – 1 April |
| Edition | 15th |
| Draw | 32S / 16D |
| Surface | Hard |
| Location | Saint-Brieuc, France |
| Champions | |
| Singles | |
 Ričardas Berankis | |
| Doubles | |
 Sander Arends /  Tristan-Samuel Weissborn | |
The 2018 Open Harmonie mutuelle was a professional tennis tournament played on hard courts. It was the fifteenth edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Saint-Brieuc, France between 26 March and 1 April 2018.
