2023 Open Castilla y León

The 2023 Open Castilla y León was a professional tennis tournament played on outdoor hard courts. It was the 37th edition of the tournament and part of the 2023 ATP Challenger Tour. It took place in El Espinar, Segovia, Spain, between 24 and 30 July 2023.

Seeds

 * 1 Rankings as of 17 July 2023.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇪🇸 David Jordà Sanchis
 * 🇬🇧 George Loffhagen
 * 🇪🇸 Fernando Verdasco

The following player received entry into the singles main draw using a protected ranking:
 * 🇫🇷 Pierre-Hugues Herbert

The following players received entry into the singles main draw as alternates:
 * Antoine Bellier
 * Gonçalo Oliveira
 * 🇨🇿 Dominik Palán

The following players received entry from the qualifying draw:
 * 🇱🇹 Edas Butvilas
 * 🇪🇸 Miguel Damas
 * 🇪🇸 John Echeverría
 * 🇪🇸 Iñaki Montes de la Torre
 * 🇮🇹 Luca Potenza
 * 🇨🇴 Adrià Soriano Barrera

Singles

 * 🇪🇸 Pablo Llamas Ruiz def. 🇫🇷 Antoine Escoffier 7–6(11–9), 7–6(7–5).

Doubles

 * 🇫🇷 Dan Added / 🇫🇷 Pierre-Hugues Herbert def. Francis Alcantara / 🇨🇳 Sun Fajing 4–6, 6–3, [12–10].