# 2019 Delray Beach Open – Singles

Frances Tiafoe was the defending champion, but lost in the first round to Dan Evans.
Evans, a qualifier, eventually reached the final but lost to Radu Albot, 6–3, 3–6, 6–7$^{(7–9)}$, double-faulting on championship point after squandering three championship points of his own in the tiebreaker. Albot became the first player from Moldova to win on the ATP Tour.

## Seeds

* Juan Martín del Potro (quarterfinals)
* John Isner (semifinals)
* Frances Tiafoe (first round)
* Steve Johnson (quarterfinals)
* John Millman (first round)
* Andreas Seppi (quarterfinals)
* Taylor Fritz (first round)
* Adrian Mannarino (quarterfinals)

## 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 |
| | Mackenzie McDonald | 6 | 0 | 0 | | | | | |
| | Radu Albot | 3 | 6 | 6 | | | | | |
| | Radu Albot | 3 | 6 | 6 | | Radu Albot | 3 | 6 | 7$^9$ |
| | | | | | Q | Dan Evans | 6 | 3 | 6$^7$ |
| Q | Dan Evans | 3 | 6 | 6 | Q | Dan Evans | 6 | 3 | 6$^7$ |
| 2/WC | John Isner | 6 | 2 | 3 | | | | | |

### 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 |
| 1/WC | JM del Potro | 6 | 7 | | | | | | | | | | | | | | | |
| | Y Nishioka | 3 | 5 | | 1/WC | JM del Potro | 6 | 6 | | | | | | | | | | |
| | T Sandgren | 4 | 0 | | | R Opelka | 4 | 4 | | | | | | | | | | |
| | R Opelka | 6 | 6 | | | | | | | 1/WC | JM del Potro | 4 | 6 | 6$^5$ | | | | |
| | G García López | 2 | 6 | 6 | | | | | | | M McDonald | 6 | 3 | 7$^7$ | | | | |
| | J Donaldson | 6 | 3 | 3 | | G García López | 5 | 4 | | | | | | | | | | |
| | M McDonald | 3 | 6 | 6 | | M McDonald | 7 | 6 | | | | | | | | | | |
| 7 | T Fritz | 6 | 4 | 3 | | | | | | | | | | | M McDonald | 6 | 0 | 0 |
| 4 | S Johnson | 7$^7$ | 6 | | | | | | | | | | | | R Albot | 3 | 6 | 6 |
| Alt | J Jung | 6$^3$ | 4 | | 4 | S Johnson | 7 | 7 | | | | | | | | | | |
| Q | T Smyczek | 5 | 3 | | | P Lorenzi | 5 | 5 | | | | | | | | | | |
| | P Lorenzi | 7 | 6 | | | | | | | 4 | S Johnson | 6 | 3 | 6$^5$ | | | | |
| | R Albot | 7$^7$ | 6 | | | | | | | | R Albot | 1 | 6 | 7$^7$ | | | | |
| | I Karlović | 6$^2$ | 4 | | | R Albot | 6 | 3 | 6 | | | | | | | | | |
| | N Kyrgios | 6 | 6$^1$ | 7$^7$ | | N Kyrgios | 2 | 6 | 3 | | | | | | | | | |
| 5 | J Millman | 4 | 7$^7$ | 6$^3$ | | | | | | | | | | | | | | |

### Bottom 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | A Seppi | 6 | 7 | | | | | | | | | | | | | | | |
| | B Tomic | 4 | 5 | | 6 | A Seppi | 6 | 4 | 6 | | | | | | | | | |
| | J Thompson | 7 | 6 | | | J Thompson | 3 | 6 | 1 | | | | | | | | | |
| | M Granollers | 5 | 1 | | | | | | | 6 | A Seppi | 4 | 4 | | | | | |
| WC | L Harris | 7$^7$ | 6 | | | | | | | Q | D Evans | 6 | 6 | | | | | |
| Q | D King | 6$^1$ | 3 | | WC | L Harris | 0 | 2 | | | | | | | | | | |
| Q | D Evans | 3 | 7$^7$ | 7 | Q | D Evans | 6 | 6 | | | | | | | | | | |
| 3 | F Tiafoe | 6 | 6$^1$ | 5 | | | | | | | | | | Q | D Evans | 3 | 6 | 6 |
| 8 | A Mannarino | 6 | 6 | | | | | | | | | | | 2/WC | J Isner | 6 | 2 | 3 |
| SE | B Schnur | 2 | 2 | | 8 | A Mannarino | 6 | 7$^7$ | | | | | | | | | | |
| | D Istomin | 7$^7$ | 6 | | | D Istomin | 2 | 6$^3$ | | | | | | | | | | |
| | F López | 6$^5$ | 2 | | | | | | | 8 | A Mannarino | 6$^2$ | 4 | | | | | |
| | L Lacko | 6 | 6 | | | | | | | 2/WC | J Isner | 7$^7$ | 6 | | | | | |
| Q | Y Watanuki | 4 | 4 | | | L Lacko | 4 | 3 | | | | | | | | | | |
| | P Polansky | 3 | 6$^4$ | | 2/WC | J Isner | 6 | 6 | | | | | | | | | | |
| 2/WC | J Isner | 6 | 7$^7$ | | | | | | | | | | | | | | | |

## Qualifying
### Seeds

* Bjorn Fratangelo (first round)
* Adrián Menéndez Maceiras (qualifying competition)
* Alexei Popyrin (qualifying competition)
* Alex Bolt (first round)
* Ramkumar Ramanathan (first round)
* Dan Evans (qualified)
* Darian King (qualified)
* Yasutaka Uchiyama (first round)

### Qualifiers

* Dan Evans
* Tim Smyczek
* Darian King
* Yosuke Watanuki

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Bjorn Fratangelo | 2 | 6$^2$ | | | | | |
| Alt | Donald Young | 6 | 7$^7$ | | | | | |
| Alt | Donald Young | 6 | 7$^7$ | | Alt | Donald Young | 2 | 6$^3$ |
| | | | | | 6 | Dan Evans | 6 | 7$^7$ |
| | Dominik Köpfer | 6 | 3 | 4 | 6 | Dan Evans | 6 | 7$^7$ |
| 6 | Dan Evans | 3 | 6 | 6 | | | | |

#### Second qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Adrián Menéndez Maceiras | 6 | 5 | 6 | | | | |
| | Andrea Arnaboldi | 4 | 7 | 4 | | | | |
| | Andrea Arnaboldi | 4 | 7 | 4 | 2 | Adrián Menéndez Maceiras | 3 | 4 |
| | | | | | | Tim Smyczek | 6 | 6 |
| | Tim Smyczek | 6 | 6 | | | Tim Smyczek | 6 | 6 |
| 8 | Yasutaka Uchiyama | 4 | 2 | | | | | |

#### Third qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Alexei Popyrin | 6 | 6 | | | | |
| WC | Preston Brown | 4 | 3 | | | | |
| WC | Preston Brown | 4 | 3 | 3 | Alexei Popyrin | 6$^3$ | 3 |
| | | | | 7 | Darian King | 7$^7$ | 6 |
| Alt | John-Patrick Smith | 4 | 6$^3$ | 7 | Darian King | 7$^7$ | 6 |
| 7 | Darian King | 6 | 7$^7$ | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Alex Bolt | 1 | 1 | | | | | |
| | Yosuke Watanuki | 6 | 6 | | | | | |
| | Yosuke Watanuki | 6 | 6 | | | Yosuke Watanuki | 6 | 6 |
| | | | | | WC | Marcelo Arévalo | 4 | 4 |
| WC | Marcelo Arévalo | 6 | 3 | 7$^7$ | WC | Marcelo Arévalo | 4 | 4 |
| 5 | Ramkumar Ramanathan | 2 | 6 | 6$^1$ | | | | |