# 2020 Amex-Istanbul Challenger – Singles

Ugo Humbert was the defending champion but chose not to defend his title.
Ilya Ivashka won the title after defeating Martin Kližan 6–1, 6–4 in the final.

## Seeds

* Pedro Martínez (withdrew)
* Jaume Munar (second round)
* Taro Daniel (first round)
* Evgeny Donskoy (first round, retired)
* Jason Jung (quarterfinals)
* Lorenzo Giustino (first round)
* Ilya Ivashka (champion)
* Mohamed Safwat (first round)

## 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 |
| | Martin Kližan | 6 | 7 | | | | | |
| Q | Borna Gojo | 4 | 5 | | | | | |
| Q | Borna Gojo | 4 | 5 | | | Martin Kližan | 1 | 4 |
| | | | | | 7 | Ilya Ivashka | 6 | 6 |
| | Benjamin Bonzi | 6 | 2 | 3 | 7 | Ilya Ivashka | 6 | 6 |
| 7 | Ilya Ivashka | 3 | 6 | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| LL | A Vatutin | 6 | 3 | 1 | | | | | | | | | | | | | | |
| Q | N Serdarušić | 4 | 6 | 6 | Q | N Serdarušić | 6$^9$ | 3 | | | | | | | | | | |
| Q | M McDonald | 6 | 6 | | Q | M McDonald | 7$^{11}$ | 6 | | | | | | | | | | |
| LL | T Gabashvili | 4 | 1 | | | | | | | Q | M McDonald | 6 | 4 | 3 | | | | |
| | I Marchenko | 6$^6$ | 3 | | | | | | | | M Kližan | 4 | 6 | 6 | | | | |
| | M Kližan | 7$^8$ | 6 | | | M Kližan | 7$^7$ | 6 | | | | | | | | | | |
| | R Marcora | 7$^8$ | 6 | | | R Marcora | 6$^3$ | 1 | | | | | | | | | | |
| 8 | M Safwat | 6$^6$ | 0 | | | | | | | | | | | | | M Kližan | 6 | 7 |
| 3 | T Daniel | 6 | 6$^4$ | 6$^3$ | | | | | | | | | | | Q | B Gojo | 4 | 5 |
| Q | B Gojo | 2 | 7$^7$ | 7$^7$ | Q | B Gojo | 6$^5$ | 7 | 6 | | | | | | | | | |
| | S Stakhovsky | 4 | 0 | | | J Clarke | 7$^7$ | 5 | 2 | | | | | | | | | |
| | J Clarke | 6 | 6 | | | | | | | Q | B Gojo | 6 | 1 | | | | | |
| | S Ofner | 6$^7$ | 6 | 6 | | | | | | | S Ofner | 3 | 0$^r$ | | | | | |
| WC | M İlhan | 7$^9$ | 4 | 4 | | S Ofner | 4 | 7 | 6 | | | | | | | | | |
| WC | A Çelikbilek | 6 | 6 | | WC | A Çelikbilek | 6 | 5 | 3 | | | | | | | | | |
| 6 | L Giustino | 0 | 3 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | J Jung | 2 | | | | | | | | | | | | | | | |
| | D Istomin | 2$^r$ | | | 5 | J Jung | 6 | 6 | | | | | | | | | |
| Q | T Lamasine | 4 | 6 | 7 | Q | T Lamasine | 0 | 3 | | | | | | | | | |
| | P Polansky | 6 | 2 | 5 | | | | | 5 | J Jung | 6$^6$ | 2 | | | | | |
| | E Gómez | 4 | 7$^8$ | 5 | | | | | | B Bonzi | 7$^8$ | 6 | | | | | |
| | M Janvier | 6 | 6$^6$ | 7 | | M Janvier | 2 | 5 | | | | | | | | | |
| | B Bonzi | 6 | 4 | | | B Bonzi | 6 | 7 | | | | | | | | | |
| 4 | E Donskoy | 2 | 1$^r$ | | | | | | | | | | | B Bonzi | 6 | 2 | 3 |
| 7 | I Ivashka | 6 | 6 | | | | | | | | | | 7 | I Ivashka | 3 | 6 | 6 |
| WC | E Kırkın | 2 | 4 | | 7 | I Ivashka | 6 | 6 | | | | | | | | | |
| | E Benchetrit | 4 | 3 | | | C İlkel | 2 | 2 | | | | | | | | | |
| | C İlkel | 6 | 6 | | | | | | 7 | I Ivashka | 6 | 6 | | | | | |
| | F Ferreira Silva | 2 | 6$^3$ | | | | | | | D Popko | 4 | 0 | | | | | |
| | D Popko | 6 | 7$^7$ | | | D Popko | 6 | 6 | | | | | | | | | |
| | E Ymer | 3 | 3 | | 2 | J Munar | 3 | 4 | | | | | | | | | |
| 2 | J Munar | 6 | 6 | | | | | | | | | | | | | | |