# 2018 Almaty Challenger 2 – Singles

Jurij Rodionov was the defending champion but chose not to defend his title.
Denis Istomin won the title after defeating Nikola Milojević 6–7$^{(4–7)}$, 7–6$^{(7–5)}$, 6–2 in the final.

## Seeds

* Denis Istomin (champion)
* Pierre-Hugues Herbert (withdrew)
* Mirza Bašić (semifinals)
* Quentin Halys (first round)
* Félix Auger-Aliassime (first round)
* Enrique López Pérez (first round)
* Miomir Kecmanović (quarterfinals)
* Lukáš Rosol (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 | Denis Istomin | 3 | 6 | 6 | | | | | |
| 8 | Lukáš Rosol | 6 | 3 | 4 | | | | | |
| 8 | Lukáš Rosol | 6 | 3 | 4 | 1 | Denis Istomin | 6$^4$ | 7$^7$ | 6 |
| | | | | | | Nikola Milojević | 7$^7$ | 6$^5$ | 2 |
| 3 | Mirza Bašić | 6 | 6$^3$ | 3 | | Nikola Milojević | 7$^7$ | 6$^5$ | 2 |
| | Nikola Milojević | 3 | 7$^7$ | 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 | Semifinals |
| 1 | D Istomin | 6 | 7 | | | | | | | | | | | | | | | |
| | F Ferreira Silva | 3 | 5 | | 1 | D Istomin | 6 | 6 | | | | | | | | | | |
| | M Safwat | 6 | 4 | 7$^7$ | | M Safwat | 2 | 1 | | | | | | | | | | |
| Q | K Sultanov | 2 | 6 | 6$^4$ | | | | | | 1 | D Istomin | 6 | 6 | | | | | |
| | A Bublik | 3 | 3 | | | | | | | 7 | M Kecmanović | 3 | 4 | | | | | |
| | K Majchrzak | 6 | 6 | | | K Majchrzak | 6$^5$ | 6 | 6$^1$ | | | | | | | | | |
| | R Safiullin | 3 | 6 | 2 | 7 | M Kecmanović | 7$^7$ | 4 | 7$^7$ | | | | | | | | | |
| 7 | M Kecmanović | 6 | 3 | 6 | | | | | | | | | | 1 | D Istomin | 3 | 6 | 6 |
| 4 | Q Halys | 2 | 4 | | | | | | | | | | | 8 | L Rosol | 6 | 3 | 4 |
| | T Kamke | 6 | 6 | | | T Kamke | 2 | 6 | 6 | | | | | | | | | |
| | I Nedelko | 4 | 6 | 4 | WC | D Yevseyev | 6 | 2 | 0 | | | | | | | | | |
| WC | D Yevseyev | 6 | 4 | 6 | | | | | | | T Kamke | 1 | 4 | | | | | |
| | T-h Yang | 7$^7$ | 6 | | | | | | | 8 | L Rosol | 6 | 6 | | | | | |
| Q | T Gabashvili | 6$^5$ | 4 | | | T-h Yang | 6$^2$ | 6 | 2 | | | | | | | | | |
| | E Karlovskiy | 6 | 3 | 4 | 8 | L Rosol | 7$^7$ | 3 | 6 | | | | | | | | | |
| 8 | L Rosol | 2 | 6 | 6 | | | | | | | | | | | | | | |

### 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 | E López Pérez | 6 | 3 | 4 | | | | | | | | | | | | | | |
| Q | I Marchenko | 3 | 6 | 6 | Q | I Marchenko | 3 | 6 | 6 | | | | | | | | | |
| WC | Sagadat Ayap | 3 | 3 | | | Z Kolář | 6 | 4 | 4 | | | | | | | | | |
| | Z Kolář | 6 | 6 | | | | | | | Q | I Marchenko | 5 | 2$^r$ | | | | | |
| | G Oliveira | 6 | 7$^7$ | | | | | | | 3 | M Bašić | 7 | 4 | | | | | |
| LL | R Statham | 1 | 6$^4$ | | | G Oliveira | 6$^4$ | 7 | 4 | | | | | | | | | |
| | D Petrović | 3 | 3 | | 3 | M Bašić | 7$^7$ | 5 | 6 | | | | | | | | | |
| 3 | M Bašić | 6 | 6 | | | | | | | | | | | 3 | M Bašić | 6 | 6$^3$ | 3 |
| 5 | F Auger-Aliassime | 4 | 6 | 5 | | | | | | | | | | | N Milojević | 3 | 7$^7$ | 6 |
| | N Milojević | 6 | 1 | 7 | | N Milojević | 6 | 3 | 6 | | | | | | | | | |
| | A Nedovyesov | 6 | 6 | | | A Nedovyesov | 3 | 6 | 1 | | | | | | | | | |
| WC | Dostanbek Tashbulatov | 3 | 1 | | | | | | | | N Milojević | 7 | 6 | | | | | |
| LL | A Dubrivnyy | 7$^7$ | 6 | | | | | | | | S Griekspoor | 5 | 2 | | | | | |
| | U Ignatik | 6$^5$ | 4 | | LL | A Dubrivnyy | 1 | 5 | | | | | | | | | | |
| | S Griekspoor | 7 | 4 | 6 | | S Griekspoor | 6 | 7 | | | | | | | | | | |
| Q | A Escoffier | 5 | 6 | 3 | | | | | | | | | | | | | | |