SIEM de Jong has not travelled to Germany for Newcastle United’s games against Malaga and Schalke 04 because of injury.
De Jong has been left on Tyneside for what has been described as a “minor” problem.
United manager Alan Pardew has taken a 26-man squad to Gelsenkirchen for the Schalke 04 Cup.
Newcastle play Malaga at the Veltins Arena tomorrow and the host club on Sunday.
Meanwhile, De Jong’s fellow summer signings Remy Cabella and Daryl Janmaat have travelled, as has Tim Krul, who was given an extended break after the World Cup.
SQUAD: Aarons, Abeid, Alnwick, Anita, Armstrong, Cabella, Campbell, Colback, Coloccini, Dummett, Elliot, Gouffran, Haidara, Janmaat, Krul, Obertan, Perez, Riviere, Satka, Sissoko, Streete, S Taylor, Tiote, Vuckic, Williamson, Yanga-Mbiwa