# 2018 Hungarian Challenger Open – Singles

Jürgen Melzer was the defending champion but chose not to defend his title.
Vasek Pospisil won the title after defeating Nicola Kuhn 7–6$^{(7–3)}$, 3–6, 6–3 in the final.

## Seeds

* Márton Fucsovics (semifinals)
* Vasek Pospisil (champion)
* Quentin Halys (first round)
* Elias Ymer (quarterfinals)
* Félix Auger-Aliassime (second round)
* Jürgen Zopp (quarterfinals)
* Viktor Galović (second round)
* Nikola Milojević (semifinals)

## 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 |
| 1 | Márton Fucsovics | 3 | 6$^5$ | | | | | | |
| Alt | Nicola Kuhn | 6 | 7$^7$ | | | | | | |
| Alt | Nicola Kuhn | 6 | 7$^7$ | | Alt | Nicola Kuhn | 6$^3$ | 6 | 3 |
| | | | | | 2 | Vasek Pospisil | 7$^7$ | 3 | 6 |
| 8 | Nikola Milojević | 5 | 6 | 4 | 2 | Vasek Pospisil | 7$^7$ | 3 | 6 |
| 2 | Vasek Pospisil | 7 | 4 | 6 | | | | | |

### 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | M Fucsovics | 7 | 6 | | | | | | | | | | | | | | |
| | A Balázs | 5 | 0 | | 1 | M Fucsovics | 6$^3$ | 6 | 6 | | | | | | | | |
| | D Novak | 3 | 3 | | | H Hurkacz | 7$^7$ | 3 | 4 | | | | | | | | |
| | H Hurkacz | 6 | 6 | | | | | | | 1 | M Fucsovics | 6 | 6 | | | | |
| | I Ivashka | 2 | 6 | 6$^3$ | | | | | | Q | K Krawietz | 4 | 3 | | | | |
| Q | K Krawietz | 6 | 3 | 7$^7$ | Q | K Krawietz | 6 | 6 | | | | | | | | | |
| | P Krstin | 2 | 0 | | 7 | V Galović | 4 | 2 | | | | | | | | | |
| 7 | V Galović | 6 | 6 | | | | | | | | | | | 1 | M Fucsovics | 3 | 6$^5$ |
| 3 | Q Halys | 7$^7$ | 1 | 6$^4$ | | | | | | | | | | Alt | N Kuhn | 6 | 7$^7$ |
| WC | M Valkusz | 6$^3$ | 6 | 7$^7$ | WC | M Valkusz | 2 | 6$^5$ | | | | | | | | | |
| | A Arnaboldi | 6$^4$ | 6 | 4 | Alt | N Kuhn | 6 | 7$^7$ | | | | | | | | | |
| Alt | N Kuhn | 7$^7$ | 4 | 6 | | | | | | Alt | N Kuhn | 6 | 6 | | | | |
| | A De Greef | 6 | 6 | | | | | | | 6 | J Zopp | 3 | 3 | | | | |
| Q | Jeremy Jahn | 1 | 3 | | | A De Greef | 3 | 6$^5$ | | | | | | | | | |
| WC | Z Piros | 4 | 6$^4$ | | 6 | J Zopp | 6 | 7$^7$ | | | | | | | | | |
| 6 | J Zopp | 6 | 7$^7$ | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 8 | N Milojević | 6 | 6 | | | | | | | | | | | | | | | |
| | V Šafránek | 3 | 4 | | 8 | N Milojević | 6 | 6 | | | | | | | | | | |
| WC | G Borsos | 7$^7$ | 7$^7$ | | WC | G Borsos | 1 | 2 | | | | | | | | | | |
| Q | A Pellegrino | 6$^5$ | 6$^5$ | | | | | | 8 | N Milojević | 7$^9$ | 6 | | | | | | |
| | A Šetkić | 5 | 7 | 1 | | | | | 4 | E Ymer | 6$^7$ | 3 | | | | | | |
| | Z Kolář | 7 | 5 | 6 | | Z Kolář | | | | | | | | | | | | |
| WC | P Nagy | 3 | 2 | | 4 | E Ymer | w/o | | | | | | | | | | | |
| 4 | E Ymer | 6 | 6 | | | | | | | | | | | 8 | N Milojević | 5 | 6 | 4 |
| 5 | F Auger-Aliassime | 3 | 7 | 6 | | | | | | | | | | 2 | V Pospisil | 7 | 4 | 6 |
| | B Rola | 6 | 5 | 1 | 5 | F Auger-Aliassime | 0 | 2 | | | | | | | | | | |
| | K Majchrzak | 5 | 2 | | Q | C Lestienne | 6 | 6 | | | | | | | | | | |
| Q | C Lestienne | 7 | 6 | | | | | | Q | C Lestienne | 4 | 6 | 3 | | | | | |
| | T Gabashvili | 5 | 2 | | | | | | 2 | V Pospisil | 6 | 4 | 6 | | | | | |
| | A Pavlásek | 7 | 6 | | | A Pavlásek | 4 | 3 | | | | | | | | | | |
| | U Ignatik | 4 | 2 | | 2 | V Pospisil | 6 | 6 | | | | | | | | | | |
| 2 | V Pospisil | 6 | 6 | | | | | | | | | | | | | | | |