Aitor Karanka brought in ex-Manchester City hitman Alvaro Negredo on loan .
Aitor Karanka also swooped for Antonio Barragan , Bernardo Espinosa , Viktor Fischer , Brad Guzan , Marten de Roon , Fabio and Victor Valdes .
Aitor Karanka brought in ex-Manchester City hitman Alvaro Negredo on loan and also swooped for Antonio Barragan , Bernardo Espinosa , Viktor Fischer , Brad Guzan , Marten de Roon , Fabio and Victor Valdes .