2021 Open Castilla y León
The 2021 Open Castilla y León was a professional tennis tournament played on outdoor hard courts. It was the 35th edition of the tournament and part of the 2021 ATP Challenger Tour. It took place in El Espinar, Segovia, Spain, between 26 July – 1 August 2021. Singles main draw entrants. Other entrants. The following players received wildcards into the singles main draw: The following players received entry into the singles main draw as alternates: The following players received entry from the qualifying draw: