According to Sky Sports, Isaac is currently conducting personal training at its former club Real Sociedad.

The news said that due to uncertainty about his future in Newcastle, Isaac is conducting personal training in Real Sociedad's training facilities.

It is understood that Newcastle is aware of Isaac's whereabouts because he is recovering from a minor thigh injury, which Newcastle said prevents him from traveling to Singapore to compete in the preseason.

After Liverpool's informal contact with Isaac, Isaac informed Newcastle that he hopes to explore his options in this summer window.