2018 Open de Rennes

The 2018 Open de Rennes was a professional tennis tournament played on hard courts. It was the twelfth edition of the tournament and part of the 2018 ATP Challenger Tour. It took place in Rennes, France between 22 and 28 January 2018.

Seeds

 * 1 Rankings are as of 15 January 2018.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇫🇷 Manuel Guinard
 * Ernests Gulbis
 * 🇫🇷 Ugo Humbert
 * 🇫🇷 Maxime Janvier

The following player received entry into the singles main draw as a special exempt:
 * 🇩🇪 Mats Moraing

The following player received entry into the singles main draw as an alternate:
 * 🇱🇹 Ričardas Berankis

The following players received entry from the qualifying draw:
 * 🇫🇷 Antoine Hoang
 * 🇫🇷 Tristan Lamasine
 * 🇯🇵 Yasutaka Uchiyama
 * 🇸🇪 Mikael Ymer

Singles

 * 🇨🇦 Vasek Pospisil def. 🇱🇹 Ričardas Berankis 6–1, 6–2.

Doubles

 * 🇧🇪 Sander Gillé / 🇧🇪 Joran Vliegen def. Sander Arends /  Antonio Šančić 6–3, 6–7(1–7), [10–7].