Rio Ferdinand believes it will be a massive task for Manchester City to retain the treble after Kevin De Bruyne's injury and the departures of Ilkay Gundogan and Riyad Mahrez

There are problems for City in the early stages of the new campaign. Ilkay Gundogan, who captained City to their treble triumph, has joined Barcelona, while Riyad Mahrez has signed for Al-Ahli.