# 2018 Citi Open – Men's singles

Alexander Zverev was the defending champion and successfully defended his title, defeating Alex de Minaur in the final, 6–2, 6–4.

## Seeds

All seeds receive byes into the second round.
    01. Alexander Zverev (champion)
    02. John Isner (second round)
    03. David Goffin (quarterfinals)
    04. Kyle Edmund (second round)
    05. Nick Kyrgios (withdrew)
    06. Lucas Pouille (third round)
    07. Kei Nishikori (quarterfinals)
    08. Chung Hyeon (third round)
    09. Denis Shapovalov (third round)
    10. Stefanos Tsitsipas (semifinals)
    11. Steve Johnson (second round)
    12. Karen Khachanov (second round)
    13. Frances Tiafoe (third round)
    14. Jérémy Chardy (second round)
    15. Mischa Zverev (third round)
    16. Andrey Rublev (semifinals)
Click on the seed number of a player to go to their draw section.

## 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

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Alexander Zverev | 3 | 6 | 6 | | | | | | | | | |
| 7 | Kei Nishikori | 6 | 1 | 4 | | | | | | | | | |
| 7 | Kei Nishikori | 6 | 1 | 4 | 1 | Alexander Zverev | 6 | 6 | | | | | |
| | | | | | 10 | Stefanos Tsitsipas | 2 | 4 | | | | | |
| 3 | David Goffin | 3 | 4 | | 10 | Stefanos Tsitsipas | 2 | 4 | | | | | |
| 10 | Stefanos Tsitsipas | 6 | 6 | | | | | | | | | | |
| 10 | Stefanos Tsitsipas | 6 | 6 | | | | | | | 1 | Alexander Zverev | 6 | 6 |
| | | | | | | | | | | | Alex de Minaur | 2 | 4 |
| | Alex de Minaur | w/o | | | | | | | | | | | | Alex de Minaur | 2 | 4 |
| | Andy Murray | | | | | | | | | | | | |
| | Andy Murray | | | | | Alex de Minaur | 5 | 7$^8$ | 6 | | | | |
| | | | | | 16 | Andrey Rublev | 7 | 6$^6$ | 4 | | | | |
| | Denis Kudla | 1 | 4 | | 16 | Andrey Rublev | 7 | 6$^6$ | 4 | | | | |
| 16 | Andrey Rublev | 6 | 6 | | | | | | | | | | |

### Top half
#### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 1 | A Zverev | 6 | 6 | | | | | | | | | | |
| | E Donskoy | 4 | 1 | | | M Jaziri | 2 | 1 | | | | | | | | | | |
| | M Jaziri | 6 | 6 | | | | | | | 1 | A Zverev | 6 | 7 | | | | | |
| WC | T Smyczek | 7$^7$ | 6 | | | | | | | 15 | M Zverev | 3 | 5 | | | | | |
| | R Berankis | 6$^4$ | 2 | | WC | T Smyczek | 2 | 6$^7$ | | | | | | | | | | |
| | | | | | 15 | M Zverev | 6 | 7$^9$ | | | | | | | | | | |
| | | | | | | | | | | | | | | 1 | A Zverev | 3 | 6 | 6 |
| | | | | | | | | | | | | | | 7 | K Nishikori | 6 | 1 | 4 |
| | | | | | 9 | D Shapovalov | 3 | 6 | 6 | | | | | | | | | |
| Q | Y Watanuki | 6 | 5 | 1 | WC | D Medvedev | 6 | 1 | 4 | | | | | | | | | |
| WC | D Medvedev | 3 | 7 | 6 | | | | | | 9 | D Shapovalov | 6$^1$ | 3 | | | | | |
| WC | S Wawrinka | 4 | 7$^7$ | 6$^3$ | | | | | | 7 | K Nishikori | 7$^7$ | 6 | | | | | |
| Q | D Young | 6 | 6$^5$ | 7$^7$ | Q | D Young | 3 | 4 | | | | | | | | | | |
| | | | | | 7 | K Nishikori | 6 | 6 | | | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | 3 | D Goffin | 6 | 1 | 7$^7$ | | | | | | | | |
| | P-H Herbert | 7 | 6 | | P-H Herbert | 2 | 6 | 6$^5$ | | | | | | | | |
| Q | M Krueger | 5 | 3 | | | | | | 3 | D Goffin | 6 | 6 | | | | |
| | I Ivashka | 4 | 3 | | | | | | 13 | F Tiafoe | 0 | 3 | | | | |
| | H Hurkacz | 6 | 6 | | H Hurkacz | 2 | 4 | | | | | | | | | |
| | | | | 13 | F Tiafoe | 6 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | 3 | D Goffin | 3 | 4 |
| | | | | | | | | | | | | | 10 | S Tsitsipas | 6 | 6 |
| | | | | 10 | S Tsitsipas | 3 | 6 | 7 | | | | | | | | |
| | J Donaldson | 6 | 7$^7$ | | J Donaldson | 6 | 3 | 5 | | | | | | | | |
| | J Thompson | 4 | 6$^4$ | | | | | | 10 | S Tsitsipas | 6 | 6 | | | | |
| PR | J Duckworth | 6 | 7 | | | | | | PR | J Duckworth | 3 | 4 | | | | |
| Q | T-S Kwiatkowski | 3 | 5 | PR | J Duckworth | 1 | 6 | 7$^7$ | | | | | | | | |
| | | | | LL | J Kubler | 6 | 2 | 6$^5$ | | | | | | | | |

### Bottom half
#### Section 3

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals |
| | | | | 8 | H Chung | 6$^2$ | 6 | 6 | | | | | | | |
| M Baghdatis | 6 | 3 | 6 | | M Baghdatis | 7$^7$ | 4 | 3 | | | | | | | |
| B Paire | 3 | 6 | 2 | | | | | | 8 | H Chung | 2 | 6 | 2 | | |
| V Pospisil | 7$^8$ | 2 | 3 | | | | | | | A de Minaur | 6 | 4 | 6 | | |
| A de Minaur | 6$^6$ | 6 | 6 | | A de Minaur | 6 | 7 | | | | | | | | |
| | | | | 11 | S Johnson | 4 | 5 | | | | | | | | |
| | | | | | | | | | | | | | | A de Minaur | w/o |
| | | | | | | | | | | | | | | A Murray | |
| | | | | 14 | J Chardy | 4 | 4 | | | | | | | | |
| M Bašić | 6$^9$ | 4 | | | M Copil | 6 | 6 | | | | | | | | |
| M Copil | 7$^{11}$ | 6 | | | | | | | | M Copil | 7$^7$ | 3 | 6$^4$ | | |
| M McDonald | 6 | 4 | 5 | | | | | | | A Murray | 6$^5$ | 6 | 7$^7$ | | |
| A Murray | 3 | 6 | 7 | | A Murray | 7$^7$ | 1 | 6 | | | | | | | |
| | | | | 4 | K Edmund | 6$^4$ | 6 | 4 | | | | | | | |

#### Section 4

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 6 | L Pouille | 6$^2$ | 6 | 3 | | | | | | | | | |
| Q | V Millot | 6 | 6 | | Q | V Millot | 7$^7$ | 4 | 0$^r$ | | | | | | | | | |
| | Y Sugita | 3 | 2 | | | | | | | 6 | L Pouille | 5 | 7$^8$ | 6$^5$ | | | | |
| | L Lacko | 7$^7$ | 1 | 4 | | | | | | | D Kudla | 7 | 6$^6$ | 7$^7$ | | | | |
| | D Kudla | 6$^3$ | 6 | 6 | | D Kudla | 6 | 6 | | | | | | | | | | |
| | | | | | 12 | K Khachanov | 2 | 3 | | | | | | | | | | |
| | | | | | | | | | | | | | | | | D Kudla | 1 | 4 |
| | | | | | | | | | | | | | | | 16 | A Rublev | 6 | 6 |
| | | | | | 16 | A Rublev | 7$^7$ | 6 | | | | | | | | | | |
| WC | T Paul | 3 | 7$^7$ | 6 | WC | T Paul | 6$^5$ | 4 | | | | | | | | | | |
| Q | A Bolt | 6 | 6$^0$ | 2 | | | | | | 16 | A Rublev | 6 | 6 | | | | | |
| | M Youzhny | 4 | 4 | | | | | | | WC | N Rubin | 3 | 2 | | | | | |
| WC | N Rubin | 6 | 6 | | WC | N Rubin | 6 | 7$^8$ | | | | | | | | | | |
| | | | | | 2 | J Isner | 4 | 6$^6$ | | | | | | | | | | |

## Qualifying
### Seeds

The top four seeds receive byes into the qualifying competition.
* Jason Kubler (qualifying competition, lucky loser)
* Ramkumar Ramanathan (qualifying competition)
* Jason Jung (qualifying competition, retired)
* Alex Bolt (qualified)
* Christopher Eubanks (qualifying competition)
* Filip Peliwo (first round)
* Mitchell Krueger (qualified)
* Donald Young (qualified)
* Stefan Kozlov (first round)
* Yosuke Watanuki (qualified)
* Vincent Millot (qualified)
* Illya Marchenko (first round)

### Qualifiers

* Yosuke Watanuki
* Mitchell Krueger
* Donald Young
* Alex Bolt
* Vincent Millot
* Thai-Son Kwiatkowski

### Lucky loser

* Jason Kubler

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| | | | | 1 | Jason Kubler | 4 | 4 |
| | | | | 10 | Yosuke Watanuki | 6 | 6 |
| Alt | Patrick Kypson | 5 | 3 | 10 | Yosuke Watanuki | 6 | 6 |
| 10 | Yosuke Watanuki | 7 | 6 | | | | |

#### Second qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| | | | | 2 | Ramkumar Ramanathan | 3 | 3 |
| | | | | 7 | Mitchell Krueger | 6 | 6 |
| WC | Andrew Fenty | 6$^4$ | 1 | 7 | Mitchell Krueger | 6 | 6 |
| 7 | Mitchell Krueger | 7$^7$ | 6 | | | | |

#### Third qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| | | | | | 3 | Jason Jung | 7 | 5 | 0$^r$ |
| | | | | | 8 | Donald Young | 5 | 7 | 1 |
| WC | Danny Thomas | 6$^2$ | 6 | 2 | 8 | Donald Young | 5 | 7 | 1 |
| 8 | Donald Young | 7$^7$ | 4 | 6 | | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| | | | | 4 | Alex Bolt | 7 | 6$^0$ | 7 |
| | | | | WC | Jared Hiltzik | 5 | 7$^7$ | 5 |
| WC | Jared Hiltzik | 6 | 6 | WC | Jared Hiltzik | 5 | 7$^7$ | 5 |
| 9 | Stefan Kozlov | 3 | 3 | | | | | |

#### Fifth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 5 | Christopher Eubanks | 6 | 6 | | | | | |
| WC | Ryan Shane | 3 | 2 | | | | | |
| WC | Ryan Shane | 3 | 2 | | 5 | Christopher Eubanks | 5 | 4 |
| | | | | | 11 | Vincent Millot | 7 | 6 |
| WC | Hunter Koontz | 2 | 7$^8$ | 2 | 11 | Vincent Millot | 7 | 6 |
| 11 | Vincent Millot | 6 | 6$^6$ | 6 | | | | |

#### Sixth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 6 | Filip Peliwo | 5 | 3 | | | | | |
| | Antoine Escoffier | 7 | 6 | | | | | |
| | Antoine Escoffier | 7 | 6 | | Antoine Escoffier | 6 | 1 | 2$^r$ |
| | | | | | Thai-Son Kwiatkowski | 3 | 6 | 5 |
| | Thai-Son Kwiatkowski | 7$^8$ | 0 | 7 | Thai-Son Kwiatkowski | 3 | 6 | 5 |
| 12/PR | Illya Marchenko | 6$^6$ | 6 | 5 | | | | |