2018 Marburg Open

The 2018 Marburg Open was a professional tennis tournament played on clay courts. It was the ninth edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Marburg, Germany between 2 and 8 July 2018.

Seeds

 * 1 Rankings are as of 25 June 2018.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇩🇪 Benjamin Hassan
 * 🇩🇪 Julian Lenz
 * 🇩🇪 Rudolf Molleker
 * 🇩🇪 Mats Rosenkranz

The following player received entry into the singles main draw as a special exempt:
 * 🇮🇹 Gianluca Mager

The following players received entry from the qualifying draw:
 * 🇧🇷 Thomaz Bellucci
 * 🇫🇷 Elliot Benchetrit
 * 🇷🇴 Dragoș Dima
 * 🇫🇷 Tristan Lamasine

Singles

 * 🇦🇷 Juan Ignacio Londero def. 🇧🇴 Hugo Dellien 3–6, 7–5, 6–4.

Doubles

 * 🇧🇷 Fabrício Neis / 🇪🇸 David Vega Hernández def. Henri Laaksonen /  Luca Margaroli 4–6, 6–4, [10–8].