The 2018 Internationaux de Tennis de Blois was a professional tennis tournament played on clay courts. It was the sixth edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Blois, France between 18 and 24 June 2018.
Singles main-draw entrants
Seeds
1 Rankings are as of 11 June 2018.
Other entrants
The following players received wildcards into the singles main draw: Jaimee Floyd Angele Calvin Hemery Alexandre Müller Stéphane Robert
The following players received entry into the singles main draw as special exempts: Roberto Marcora Johan Tatlot
The following players received entry from the qualifying draw: Marcelo Tomás Barrios Vera Tristan Lamasine Jules Okala Mikael Ymer
The following player received entry as a lucky loser: Harri Heliövaara
Champions
Singles
Scott Griekspoor def. Félix Auger-Aliassime 6–4, 6–4.
Doubles
Fabrício Neis / David Vega Hernández def. Hsieh Cheng-peng / Rameez Junaid 7–6(7–4), 6–1.