The spat deepened recently when a group of players ended their relationship with the federation amid claims the president of the Spanish Tennis Federation Jose Luis Escanuela has failed to deliver on promises.
The group, which includes the likes of Carla Suarez Navarro, Silvia Soler Espinosa, Lourdes Dominguez Lino and Laura Pous Tio, say Escanuela has gone back on his word regarding the future of the women's game in Spain.
Last week they expressed their “profound disappointment and disillusionment” with Escanuela, and now Sanchez-Vicario appears to have sided with the players.
"Although I have not been part of any meeting between players or contract talks, I cannot ignore most of the players and stay on the sidelines," the former world number one said.
“I hope this serves as a lever for the Spanish Tennis Federation to take action and decisions in favour of a radical change in its approach to women’s tennis."
Spain lost the two Fed Cup matches played under Sanchez-Vicario and must now find a replacement before their next encounter, a World Group II clash against Ukraine in February.