Newcastle United coach Eddie Howe has sent a direct and firm message to the team's striker Alexander Isak, amid ongoing tensions with the player regarding his future with the team.

The Swedish star had refused to join the team for the preparatory camp, and has recently trained at his former club Real Sociedad, before returning a few days ago to Newcastle to train with the team.

How said in his statements: "We are Newcastle United! You have to earn the right to train with us. No player should expect to behave poorly and then return to training as if nothing happened."

He added: "Every player in this team bears a great responsibility, and they must act appropriately. Respect and discipline are non-negotiable."

How's statements come at a time when speculation is increasing about Isak's future, amid Liverpool's interest in acquiring his services.