The 2013 Open Castilla y León was a professional tennis tournament played on hard courts. It was the 28th edition of the tournament which was part of the 2013 ATP Challenger Tour. It took place in Segovia, Spain between 29 July and 4 August 2013.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Spain | Pablo Carreño Busta | 115 | 1 | |
 Romania | Marius Copil | 137 | 2 | |
 Kazakhstan | Andrey Golubev | 141 | 3 | |
 Italy | Flavio Cipolla | 145 | 4 | |
| Marco Chiudinelli | 158 | 5 | ||
 Belarus | Uladzimir Ignatik | 168 | 6 | |
 France | Florent Serra | 182 | 7 | |
| France | Pierre-Hugues Herbert | 218 | 8 |
The following players received wildcards into the singles main draw:
Iván Arenas-Gualda Roberto Ortega-Olmedo Ricardo Villacorta-Alonso Christian Florentin VoineaThe following players received entry as special exempt:
The following players received entry as protected ranking:
The following players received entry as an alternate:
The following players received entry from the qualifying draw:
Erik Crepaldi
Mikhail Elgin
David RiceSee main article: 2013 Open Castilla y León – Singles.
Pablo Carreño Busta def. Albano Olivetti 6–4, 7–6(7–2)See main article: 2013 Open Castilla y León – Doubles.
Ken Skupski / Neal Skupski def. Mikhail Elgin / Uladzimir Ignatik 6–3, 6–7(4–7), [10–6]