Daniel Alves is training with Barca Atletic.
The 39 year-old Pumas fullback is in Europe with Mexico's LigaMX now over. He signed for Pumas over the summer.
The Brazil international has returned to Barca to train and keep up his fitness ahead of the World Cup next month.
Sport says Alves made a request to Barca president Joan Laporta about training with Barca Atletic.
He is now working with Barca B coach Rafa Marquez.