In the
2016-17 season the club finished 14th in the Tercera División, Group 8.[5]
Already in a partnership agreement with the local professional club
Real Valladolid, in August 2020 the two clubs made a formal arrangement for Atlético Tordesillas to function as a subsidiary team (below
Real Valladolid Promesas), with the first team players and staff provided and controlled by Valladolid but Tordesillas keeping the identity (badge, kit and stadium), as well as retaining control of the club structure in other areas.[6][7] This arrangement ended one year later on mutual agreement, after
Real Valladolid was relegated to
Segunda División.[8]