# 2017 Open Castilla y León – Men's singles

Luca Vanni was the defending champion but lost in the first round to Gerard Granollers.
Jaume Munar won the title after defeating Alex De Minaur 6–3, 6–4 in the final.

## Seeds

* Marcel Granollers (quarterfinals)
* Peter Gojowczyk (first round)
* Sergiy Stakhovsky (first round)
* Luca Vanni (first round)
* Egor Gerasimov (first round)
* Adrián Menéndez-Maceiras (first round)
* Matteo Berrettini (semifinals)
* Ilya Ivashka (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 |
| | Jaume Munar | 7$^7$ | 6$^5$ | 6 | | | |
| WC | Gerard Granollers | 6$^5$ | 7$^7$ | 2 | | | |
| WC | Gerard Granollers | 6$^5$ | 7$^7$ | 2 | Jaume Munar | 6 | 6 |
| | | | | | Alex De Minaur | 3 | 4 |
| | Alex De Minaur | 7$^7$ | 7 | | Alex De Minaur | 3 | 4 |
| 7 | Matteo Berrettini | 6$^4$ | 5 | | | | |

### 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 | M Granollers | 6$^5$ | 7$^7$ | 6 | | | | | | | | | | | | | | |
| | C Garin | 7$^7$ | 6$^2$ | 4 | 1 | M Granollers | 6 | 6 | | | | | | | | | | |
| WC | C Taberner | 7$^7$ | 2 | 7 | WC | C Taberner | 1 | 4 | | | | | | | | | | |
| Q | Mick Lescure | 6$^2$ | 6 | 5 | | | | | | 1 | M Granollers | 3 | 4 | | | | | |
| | J Munar | 6 | 6 | | | | | | | | J Munar | 6 | 6 | | | | | |
| | A Olivetti | 3 | 2 | | | J Munar | 6 | 7$^7$ | | | | | | | | | | |
| | C İlkel | 7$^9$ | 7$^7$ | | | C İlkel | 2 | 6$^2$ | | | | | | | | | | |
| 8 | I Ivashka | 6$^7$ | 6$^1$ | | | | | | | | | | | | J Munar | 7$^7$ | 6$^5$ | 6 |
| 4 | L Vanni | 3 | 4 | | | | | | | | | | | WC | G Granollers | 6$^5$ | 7$^7$ | 2 |
| WC | G Granollers | 6 | 6 | | WC | G Granollers | 6 | 2 | 7 | | | | | | | | | |
| | M Chiudinelli | 7$^7$ | 6 | | | M Chiudinelli | 4 | 6 | 5 | | | | | | | | | |
| WC | B Zapata Miralles | 6$^2$ | 1 | | | | | | | WC | G Granollers | 6 | 6 | | | | | |
| | G Oliveira | 6 | 3 | 6 | | | | | | | L Lokoli | 4 | 4 | | | | | |
| | Y Mertens | 3 | 6 | 4 | | G Oliveira | 6 | 6$^2$ | 4 | | | | | | | | | |
| | L Lokoli | 6 | 6 | | | L Lokoli | 4 | 7$^7$ | 6 | | | | | | | | | |
| 5 | E Gerasimov | 3 | 2 | | | | | | | | | | | | | | | |

### 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 |
| 6 | A Menéndez-Maceiras | 6$^6$ | 6$^4$ | | | | | | | | | | | | | | |
| | A De Minaur | 7$^8$ | 7$^7$ | | | A De Minaur | 6 | 7$^{12}$ | | | | | | | | | |
| Q | D Vega Hernández | 2 | 1 | | | K-M Maamoun | 2 | 6$^{10}$ | | | | | | | | | |
| | K-M Maamoun | 6 | 6 | | | | | | | A De Minaur | 7$^7$ | 6 | | | | | |
| | T Griekspoor | 6 | 6$^3$ | 7 | | | | | | T Griekspoor | 6$^5$ | 4 | | | | | |
| | P Martínez | 4 | 7$^7$ | 5 | | T Griekspoor | 6 | 7 | | | | | | | | | |
| | S Diez | 2 | 7$^{10}$ | 6 | | S Diez | 4 | 5 | | | | | | | | | |
| 3 | S Stakhovsky | 6 | 6$^8$ | 3 | | | | | | | | | | | A De Minaur | 7$^7$ | 7 |
| 7 | M Berrettini | 6 | 4 | 6 | | | | | | | | | | 7 | M Berrettini | 6$^4$ | 5 |
| Q | H Grenier | 3 | 6 | 3 | 7 | M Berrettini | 6 | 6 | | | | | | | | | |
| WC | N Álvarez Varona | 0 | 2 | | | B Bonzi | 4 | 4 | | | | | | | | | |
| | B Bonzi | 6 | 6 | | | | | | 7 | M Berrettini | 6$^5$ | 7$^7$ | 6 | | | | |
| Q | Edoardo Eremin | 7$^7$ | 2 | 0$^r$ | | | | | | A Šetkić | 7$^7$ | 6$^5$ | 4 | | | | |
| | A Ghem | 6$^3$ | 6 | 1 | | A Ghem | 3 | 5 | | | | | | | | | |
| | A Šetkić | 6 | 6 | | | A Šetkić | 6 | 7 | | | | | | | | | |
| 2 | P Gojowczyk | 3 | 4 | | | | | | | | | | | | | | |