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, and it took place in Rennes, France between 22 and 28 January 2018.

Singles main-draw entrants

Seeds

¹ Rankings are as of 15 January 2018.

Other entrants

The following players received wildcards into the singles main draw:

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:

Champions

Singles

Vasek Pospisil def. Ričardas Berankis 6–1, 6–2.

Doubles

Sander Gillé / Joran Vliegen def. Sander Arends / Antonio Šančić 6–3, 6–7, .