2019 Open Harmonie mutuelle

The 2019 Open Harmonie mutuelle was a professional tennis tournament played on hard courts. It was the sixteenth edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Saint-Brieuc, France between 25 and 31 March 2019.

Seeds

 * Rankings are as of 18 March 2019.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇫🇷 Evan Furness
 * 🇫🇷 Hugo Grenier
 * 🇫🇷 Manuel Guinard
 * 🇫🇷 Matteo Martineau
 * 🇫🇷 Alexandre Müller

The following player received entry into the singles main draw as an alternate:
 * 🇷🇺 Pavel Kotov

The following players received entry into the singles main draw using their ITF World Tennis Ranking:
 * 🇪🇸 Andrés Artuñedo
 * 🇫🇷 Baptiste Crepatte
 * 🇫🇷 Grégoire Jacq
 * 🇷🇺 Roman Safiullin

The following players received entry from the qualifying draw:
 * 🇷🇺 Aslan Karatsev
 * 🇺🇦 Sergiy Stakhovsky

The following player received entry as a lucky loser:
 * Jelle Sels

Singles

 * 🇵🇱 Kamil Majchrzak def. 🇫🇷 Maxime Janvier 6–3, 7–6(7–1).

Doubles

 * 🇮🇱 Jonathan Erlich / 🇫🇷 Fabrice Martin def. 🇫🇷 Jonathan Eysseric / Antonio Šančić 7–6(7–2), 7–6(7–2).