Jamaal Lascelles, Paul Dummett and Jacob Murphy will sit out tonight's friendly against St Patrick's Athletic.
Newcastle United open their pre-season campaign with a game against the Dublin side at Richmond Park (7.45pm kick-off).
Captain Lascelles will miss the game with "tightness", while Murphy has a minor tendon problem. Dummett trained on his own this morning at the club's Carlton House base.
Rafa Benitez has handed midfielder Sean Longstaff and defender Josef Yarney their debuts.
NEWCASTLE UNITED: Darlow; Manquillo, Yarney, Lejeune, Aarons; Diame, Longstaff; Ritchie, Perez, Fernandez; Joselu. Subs: Sels, Dubravka, Yedlin, Clark, Shelvey, Atsu, Kenedy, Roberts, Armstrong, Gayle.