| Singles | |
|---|---|
| 2015 Open Castilla y León | |
| Champion |  Evgeny Donskoy |
| Runner-up |  Marco Chiudinelli |
| Score | 7–6(7–2), 6–3 |
Adrian Mannarino was the defending champion, but did not participate this year.
Evgeny Donskoy won the tournament, defeating Marco Chiudinelli in the final, 7–6(7–2), 6–3.
Marcel Granollers (semifinals)
Dustin Brown (second round) Matthias Bachinger (first round) Adrián Menéndez-Maceiras (second round)
Mirza Bašić (quarterfinals) Peter Gojowczyk (second round)
Vincent Millot (first round) Alexander Kudryavtsev (second round)| Semifinals | Final | ||||||||||||
| 1/WC | Marcel Granollers | 2 | 63 | ||||||||||
| Evgeny Donskoy | 6 | 77 | |||||||||||
| Evgeny Donskoy | 77 | 6 | |||||||||||
| PR | Marco Chiudinelli | 62 | 3 | ||||||||||
| PR | Marco Chiudinelli | 67 | 6 | 6 | |||||||||
 Connor Smith | 79 | 2 | 4 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1/WC | M Granollers | 6 | 6 | ||||||||||||||||||||||||
 C Zampieri | 1 | 1 | 1/WC | M Granollers | 7 | 6 | |||||||||||||||||||||
| Q | Georgi Rumenov | 4 | 6 | 6 | Q | G Rumenov | 5 | 2 | |||||||||||||||||||
| WC |  Y-s Chung | 6 | 1 | 3 | 1/WC | M Granollers | 6 | 6 | |||||||||||||||||||
 Y Mertens | 6 | 6 | Y Mertens | 2 | 4 | ||||||||||||||||||||||
| Q | Sébastien Boltz | 4 | 2 | Y Mertens | 6 | 6 | |||||||||||||||||||||
 M Dubarenco | 2 | 1r | 8 | A Kudryavtsev | 2 | 2 | |||||||||||||||||||||
| 8 | A Kudryavtsev | 6 | 0 | 1/WC | M Granollers | 2 | 63 | ||||||||||||||||||||
| 4 | A Menéndez-Maceiras | 4 | 6 | 6 | E Donskoy | 6 | 77 | ||||||||||||||||||||
| Q Halys | 6 | 3 | 1 | 4 | A Menéndez-Maceiras | 2 | 4 | ||||||||||||||||||||
| WC | Jorge Ruano | 4 | 2 | E Donskoy | 6 | 6 | |||||||||||||||||||||
| E Donskoy | 6 | 6 | E Donskoy | 6 | 6 | ||||||||||||||||||||||
 Erik Crepaldi | 1 | 1 | K Kravchuk | 4 | 4 | ||||||||||||||||||||||
| K Kravchuk | 6 | 6 | K Kravchuk | 6 | 6 | ||||||||||||||||||||||
| LL | R Ortega-Olmedo | 4 | 2 | 6 | P Gojowczyk | 4 | 2 | ||||||||||||||||||||
| 6 | P Gojowczyk | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 7 | V Millot | 3 | 3 | ||||||||||||||||||||||||
 D Molchanov | 6 | 6 | D Molchanov | 2 | 62 | ||||||||||||||||||||||
| PR | M Chiudinelli | 6 | 6 | PR | M Chiudinelli | 6 | 77 | ||||||||||||||||||||
| WC | Francisco Blanco Paris | 2 | 0 | PR | M Chiudinelli | 6 | 5 | 7 | |||||||||||||||||||
| Q | E Gerasimov | 6 | 7 | Q | E Gerasimov | 3 | 7 | 5 | |||||||||||||||||||
 H Moriya | 4 | 5 | Q | E Gerasimov | 77 | 6 | |||||||||||||||||||||
| D Guez | 6 | 6 | D Guez | 64 | 4 | ||||||||||||||||||||||
| 3 | M Bachinger | 4 | 3 | PR | M Chiudinelli | 67 | 6 | 6 | |||||||||||||||||||
| 5 | M Bašić | 6 | 6 | C Smith | 79 | 2 | 4 | ||||||||||||||||||||
 D Wu | 2 | 2 | 5 | M Bašić | 6 | 6 | |||||||||||||||||||||
| Q |  N Mektić | 6 | 7 | Q | N Mektić | 4 | 4 | ||||||||||||||||||||
| LL | R Ghedin | 4 | 5 | 5 | M Bašić | 6 | 2 | 5 | |||||||||||||||||||
| Connor Smith | 6 | 6 | C Smith | 1 | 6 | 7 | |||||||||||||||||||||
| Henrique Cunha | 2 | 2 | C Smith | 6 | 6 | ||||||||||||||||||||||
 FF Silva | 3 | 65 | 2 | D Brown | 4 | 2 | |||||||||||||||||||||
| 2 | D Brown | 6 | 77 | ||||||||||||||||||||||||
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