| 2018 Winston-Salem Open | |
|---|---|
| Date | August 19–25 | 
| Edition | 50th | 
| Category | ATP World Tour 250 Series | 
| Draw | 48S / 16D | 
| Surface | Hard / outdoor | 
| Location | Winston-Salem, North Carolina, U.S. | 
| Venue | Wake Forest University | 
| Champions | |
| Singles | |
| Doubles | |
The 2018 Winston-Salem Open was a men's tennis tournament played on outdoor hard courts. It was the 50th edition of the Winston-Salem Open (as successor to previous tournaments in New Haven and Long Island), and part of the ATP World Tour 250 Series of the 2018 ATP World Tour. It took place at Wake Forest University in Winston-Salem, North Carolina, United States, from August 19 through August 25, 2018. It was the last event on the 2018 US Open Series before the 2018 US Open.
Singles main-draw entrants
Seeds
| Country | Player | Rank* | Seed | 
|---|---|---|---|
| Pablo Carreño Busta | 13 | 2 | |
| Kyle Edmund | 16 | 3 | |
| Marco Cecchinato | 22 | 4 | |
| Chung Hyeon | 25 | 6 | |
| Filip Krajinović | 31 | 7 | |
| Steve Johnson | 33 | 8 | |
| Sam Querrey | 34 | 9 | |
| Nikoloz Basilashvili | 36 | 10 | |
| Andrey Rublev | 37 | 11 | |
| Albert Ramos Viñolas | 41 | 13 | |
| Nicolás Jarry | 42 | 14 | |
| Alex de Minaur | 43 | 15 | |
| Peter Gojowczyk | 47 | 16 | 
* Rankings are as of August 13, 2018
Other entrants
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following players received entry as lucky losers:
Withdrawals
- Before the tournament
 
 Alexandr Dolgopolov → replaced by 
 Guido Pella
 Jared Donaldson → replaced by 
 Franko Škugor
 Damir Džumhur → replaced by 
 Dominik Köpfer
 David Goffin → replaced by 
 Guido Andreozzi
 Mikhail Kukushkin → replaced by 
 Laslo Đere
 Feliciano López → replaced by 
 Marcos Baghdatis
 Fernando Verdasco → replaced by 
 Jaume Munar
- During the tournament
 
Doubles main-draw entrants
Seeds
| Country | Player | Country | Player | Rank1 | Seed | 
|---|---|---|---|---|---|
| Łukasz Kubot | Marcelo Melo | 23 | 1 | ||
| Jean-Julien Rojer | Horia Tecău | 25 | 2 | ||
| Ben McLachlan | Jan-Lennard Struff | 53 | 3 | ||
| Julio Peralta | Horacio Zeballos | 64 | 4 | 
- Rankings are as of August 13, 2018
 
Other entrants
The following pairs received wildcards into the doubles main draw:
The following pair received entry as alternates:
Withdrawals
- Before the tournament
 
Champions
Singles
 Daniil Medvedev def. 
 Steve Johnson, 6–4, 6–4
Doubles
 Jean-Julien Rojer / 
 Horia Tecău def. 
 James Cerretani / 
 Leander Paes, 6–4, 6–2