MADRID, Aug. 1 (Xinhua) -- Newcastle United striker Alexander Isak is working to get back to fitness at the training ground of his former club Real Sociedad.

Apart from returning loanees, such as Umar Sadiq and Jon Karrikaburu, Caleta-Car is the first player to arrive at Real Sociedad after a summer which also saw coach Imanol Alguacil leave the club after ...