Leonardo Mayer was the defending champion, but lost in the final to Nikoloz Basilashvili, 4–6, 6–0, 5–7. This was Basilashvili's first ATP World Tour title, as well as the first ATP title won by a Georgian player since

Alexander Metreveli Alexander Irakliyevich Metreveli ( ka, ალექსანდრე მეტრეველი, tr, ; russian: Александр Ираклиевич Метревели ; born 2 November 1944) is a retired Soviet tennis player of Georgian b ...

Seeds

Draw

Finals

Top half

Bottom half

Qualifying

Seeds

Qualifiers

Lucky loser

# Thiago Monteiro

Qualifying draw

First qualifier

Second qualifier

Third qualifier

Fourth qualifier

References

Main drawQualifying draw
{{DEFAULTSORT:2018 German Open - Singles German Open - Singles 2018 International German Open