The agent of Samir Nasri admits the midfielder is feeling under attack at Manchester City.

Nasri was criticised by City boss Roberto Mancini for his weak actions in the wall for Manchester United striker Robin van Persie's derby winner a fortnight ago.

"Internally, he is a bit isolated, although he is a strong person," agent Jean-Pierre Bernes said. "Nasri has suffered inwardly, because the criticism after the incident against United was not fair. In life you accept criticism when its fair and not excessive."