The 2018 Geneva Open (also known as the Banque Eric Sturdza Geneva Open for sponsorship reasons) 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.[1]
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 United States | Sam Querrey | 13 | 1 | |
 Italy | Fabio Fognini | 19 | 2 | |
| Stan Wawrinka | 25 | 3 | ||
 Spain | Albert Ramos Viñolas | 36 | 4 | |
| Spain | David Ferrer | 42 | 5 | |
| United States | Steve Johnson | 47 | 6 | |
| Italy | Andreas Seppi | 51 | 7 | |
| Mischa Zverev | 52 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
Alexandr Dolgopolov → replaced by 
Marcos Baghdatis
David Goffin → replaced by Florian Mayer
Mirza Bašić Paolo Lorenzi → replaced by Marco Cecchinato
Denis Shapovalov → replaced by Ivo Karlović| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
 Austria | Oliver Marach | Mate Pavić | 11 | 1 | ||
| Ivan Dodig | United States | Rajeev Ram | 37 | 2 | ||
 Belarus | Max Mirnyi | Austria | Philipp Oswald | 80 | 3 | |
 Brazil | Marcelo Demoliner |  Mexico | Santiago González | 87 | 4 |
The following pairs received wildcards into the doubles main draw:
See main article: 2018 Geneva Open – Singles.
Márton Fucsovics def. Peter Gojowczyk, 6–2, 6-2See main article: 2018 Geneva Open – Doubles.
Oliver Marach / Mate Pavić def. Ivan Dodig / Rajeev Ram, 3–6, 7–6(7–3), [11–9]
