Athletic Club have reached an agreement in principle with Ander Herrera, according to Pedro Morata.
The midfielder, who turns 33 on Sunday, will leave PSG in the summer transfer window and talks are underway regarding a move to San Mamés.
The Ligue 1 club are ready to facilitate the departure of the former Manchester United player, who still has two years left on his contract in Paris.
Marca reports that several teams from different leagues have shown interest. Herrera joined Athletic in 2011 from Zaragoza and in 2014 he left San Mamés to join Manchester United. After five seasons at Old Trafford, he signed for PSG.
The deal will depend a lot on the agreement reached between the player and PSG.