2018 Geneva Open
The 2018 Geneva Open was a men's tennis tournament played on outdoor clay courts. It was the 16th edition of the Geneva Open and part of the ATP World Tour 250 series of the 2018 ATP World Tour. It took place at the Tennis Club de Genève in Geneva, Switzerland, from May 20 through May 26, 2018.
Singles main draw entrants
Seeds
- Rankings are as of May 14, 2018.
Other entrants
The following players received entry from the qualifying draw:
;Before the tournament
- Alexandr Dolgopolov → replaced by Marcos Baghdatis
- David Goffin → replaced by Florian Mayer
- Philipp Kohlschreiber → replaced by Mirza Bašić
- Paolo Lorenzi → replaced by Marco Cecchinato
- Denis Shapovalov → replaced by Ivo Karlović
Doubles main draw entrants
Seeds
- Rankings are as of May 14, 2018.
Other entrants
- Antoine Bellier / Johan Nikles
- Marius Copil / Constantin Sturdza
Champions
Singles
- Márton Fucsovics def. Peter Gojowczyk, 6–2, 6-2
Doubles
- Oliver Marach / Mate Pavić def. Ivan Dodig / Rajeev Ram, 3–6, 7–6,