Manchester City have slipped to 19th in the Premier League table . Sergio Aguero may look elsewhere should City continue to struggle . Argentine striker has scored 19 Premier League goals so far this season . Manuel Pellegrini 's future as City boss is also in doubt . Real Madrid and Barcelona are both fans of the former Atletico Madrid star .
Manchester City have slipped to fourth in the Premier League table . Sergio Aguero may look elsewhere should City continue to struggle . Argentine striker has scored 19 Premier League goals so far this season . Manuel Pellegrini 's future as City boss is also in doubt . Real Madrid and Barcelona are both fans of the former Atletico Madrid star .