Open Saint-Brieuc
Image:ChristopheRochusStuttgart06.jpg|thumb|200px|2004 singles runner-up, doubles champion, Belgian Christophe Rochus eventually took the singles title in 2008Image:MG1.jpg|thumb|200px|Marc Gicquel is one of seven Frenchmen to have won the singles title in the tournament's twelve editions
The Open Saint-Brieuc Armor Agglomération is a professional tennis tournament played on indoor hardcourts. It is part of the ATP [Challenger Tour]. It is held annually in Saint-Brieuc, France, in 2004-2024 and restarting in 2026 as a Challenger 100.