Former Bayern Munich coach Ottmar Hitzfeld says coach Pep Guardiola is not fully convinced about Mario Gotze's consistency.
The 23-year-old is a target for Arsenal and Manchester United according to reports in England.
Sevilla hope to ward off interest in Grzegorz Krychowiak by offering the Poland international a substantial pay rise in a new contract, Eurosport has reported.
Arsenal winger Wellington Silva has joined Bolton Wanderers on a season-long loan deal.
The youngster joined the Gunners during the 2010 January transfer window but was sent out on loan to Levante, Alcoyano, Ponferradina, Murcia and Almeria in recent seasons.