Manchester City striker Sergio Aguero is unsettled at the Etihad.

The People says sources close to the Argentinian striker claim his spirits are low and he has become unsettled at the club this season after their Champions League exit and amid dressing room unrest.

Aguero - who scored the opener in City's 3-1 win at Newcastle yesterday - was upset at City boss Roberto Mancini for publicly ­criticising his strike-force over their lack of goals this season.

His pop at his strikers - and midfielder Sami Nasri for his role in van Persie's goal last week - did not impress Aguero.

He has been eyed by both Spanish giants Real Madrid and Barcelona - and City would expect to recoup his massive transfer fee if he moved on.