# 2018 U.S. Men's Clay Court Championships – Singles

Steve Johnson was the defending champion and successfully defended his title, defeating Tennys Sandgren in the final, 7–6$^{(7–2)}$, 2–6, 6–4.

## Seeds

The top four seeds received a bye into the second round.
* John Isner (quarterfinals)
* Sam Querrey (second round)
* Jack Sock (quarterfinals)
* Nick Kyrgios (quarterfinals)
* Fernando Verdasco (first round)
* Steve Johnson (champion)
* Ryan Harrison (second round)
* Tennys Sandgren (final)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 6 | Steve Johnson | 7 | 6$^4$ | 6 | | | | | |
| | Taylor Fritz | 5 | 7$^7$ | 2 | | | | | |
| | Taylor Fritz | 5 | 7$^7$ | 2 | 6 | Steve Johnson | 7$^7$ | 2 | 6 |
| | | | | | 8 | Tennys Sandgren | 6$^2$ | 6 | 4 |
| | Ivo Karlović | 6$^2$ | 6$^4$ | | 8 | Tennys Sandgren | 6$^2$ | 6 | 4 |
| 8 | Tennys Sandgren | 7$^7$ | 7$^7$ | | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | J Isner | 6 | 6 | | | | | | | | | | | |
| WC | D Brown | 4 | 3 | | | H Laaksonen | 4 | 2 | | | | | | | | | | | |
| | H Laaksonen | 6 | 6 | | | | | | | 1 | J Isner | 6$^4$ | 6 | 6$^5$ | | | | | |
| | F Tiafoe | 6 | 6 | | | | | | | 6 | S Johnson | 7$^7$ | 4 | 7$^7$ | | | | | |
| WC | M McDonald | 3 | 3 | | | F Tiafoe | 3 | 4 | | | | | | | | | | | |
| | E Escobedo | 6 | 6$^5$ | 2 | 6 | S Johnson | 6 | 6 | | | | | | | | | | | |
| 6 | S Johnson | 3 | 7$^7$ | 6 | | | | | | | | | | | 6 | S Johnson | 7 | 6$^4$ | 6 |
| | | | | | | | | | | | | | | | | T Fritz | 5 | 7$^7$ | 2 |
| | | | | | 3 | J Sock | 6 | 6 | | | | | | | | | | | |
| | H Zeballos | 6 | 6 | | | H Zeballos | 4 | 4 | | | | | | | | | | | |
| Q | Y Nishioka | 1 | 2 | | | | | | | 3 | J Sock | 3 | 6 | 4 | | | | | |
| | T Smyczek | 7$^7$ | 2 | 6$^6$ | | | | | | | T Fritz | 6 | 3 | 6 | | | | | |
| | T Fritz | 6$^3$ | 6 | 7$^8$ | | T Fritz | 3 | 6 | 6 | | | | | | | | | | |
| Q | M Kecmanović | 4 | 3 | | 7 | R Harrison | 6 | 0 | 3 | | | | | | | | | | |
| 7 | R Harrison | 6 | 6 | | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | F Verdasco | 4 | 6$^4$ | | | | | | | | | | | | | | |
| Q | D Kudla | 6 | 7$^7$ | Q | D Kudla | 5 | 5 | | | | | | | | | | |
| | T Daniel | 6$^5$ | 4 | | I Karlović | 7 | 7 | | | | | | | | | | |
| | I Karlović | 7$^7$ | 6 | | | | | | | I Karlović | 3 | 6 | 6 | | | | |
| | B Fratangelo | 6 | 6 | | | | | | 4/WC | N Kyrgios | 6 | 2 | 3 | | | | |
| | J Thompson | 1 | 1 | | B Fratangelo | 7$^7$ | 1 | 2 | | | | | | | | | |
| | | | | 4/WC | N Kyrgios | 6$^2$ | 6 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | | | I Karlović | 6$^2$ | 6$^4$ |
| 8 | T Sandgren | 6 | 6 | | | | | | | | | | | 8 | T Sandgren | 7$^7$ | 7$^7$ |
| | B Kavčič | 2 | 2 | 8 | T Sandgren | 6 | 7$^7$ | | | | | | | | | | |
| | N Kicker | 6 | 6 | | N Kicker | 2 | 6$^3$ | | | | | | | | | | |
| | D Young | 3 | 2 | | | | | | 8 | T Sandgren | 4 | 7 | 6 | | | | |
| Q | S Kozlov | 3 | 2 | | | | | | | G Pella | 6 | 5 | 3 | | | | |
| | G Pella | 6 | 6 | | G Pella | 2 | 7$^7$ | 7$^7$ | | | | | | | | | |
| | | | | 2 | S Querrey | 6 | 6$^4$ | 6$^3$ | | | | | | | | | |

## Qualifying
### Seeds

* Cameron Norrie (first round)
* Denis Kudla (qualified)
* Thomaz Bellucci (first round)
* Michael Mmoh (first round)
* Bradley Klahn (qualifying competition)
* Dennis Novikov (qualifying competition)
* Akira Santillan (qualifying competition)
* Darian King (first round)

### Qualifiers

* Yoshihito Nishioka
* Denis Kudla
* Stefan Kozlov
* Miomir Kecmanović

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Cameron Norrie | 1 | 4 | | | | | |
| WC | Yoshihito Nishioka | 6 | 6 | | | | | |
| WC | Yoshihito Nishioka | 6 | 6 | | WC | Yoshihito Nishioka | 6 | 6 |
| | | | | | 5 | Bradley Klahn | 2 | 0 |
| WC | Christopher Eubanks | 6$^7$ | 6 | 6$^4$ | 5 | Bradley Klahn | 2 | 0 |
| 5 | Bradley Klahn | 7$^9$ | 4 | 7$^7$ | | | | |

#### Second qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Denis Kudla | 6 | 6 | | | | |
| | Reilly Opelka | 4 | 3 | | | | |
| | Reilly Opelka | 4 | 3 | 2 | Denis Kudla | 6 | 7 |
| | | | | | Mitchell Krueger | 3 | 5 |
| | Mitchell Krueger | 7 | 6 | | Mitchell Krueger | 3 | 5 |
| 8 | Darian King | 5 | 3 | | | | |

#### Third qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Thomaz Bellucci | 7$^7$ | 3 | 6$^5$ | | | | |
| | Stefan Kozlov | 6$^3$ | 6 | 7$^7$ | | | | |
| | Stefan Kozlov | 6$^3$ | 6 | 7$^7$ | | Stefan Kozlov | 6 | 6 |
| | | | | | 7 | Akira Santillan | 2 | 0 |
| Alt | Dominik Köpfer | 4 | 3 | | 7 | Akira Santillan | 2 | 0 |
| 7 | Akira Santillan | 6 | 6 | | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Michael Mmoh | 1 | 6$^4$ | | | | | | |
| | Miomir Kecmanović | 6 | 7$^7$ | | | | | | |
| | Miomir Kecmanović | 6 | 7$^7$ | | | Miomir Kecmanović | 6 | 5 | 6 |
| | | | | | 6 | Dennis Novikov | 4 | 7 | 3 |
| | Evan King | 5 | 7$^7$ | 4 | 6 | Dennis Novikov | 4 | 7 | 3 |
| 6 | Dennis Novikov | 7 | 6$^2$ | 6 | | | | | |