Manchester City have target how to defend their treble winner next season, not only with Primer League, FA Cup but also The Citizen want to defend Champion League tittle and want to make new history winning treble winner in a row.
Next season Manchester City will play with the new squad because Gundongan was leave and Kovacic will replace him, I'm not really sure they will win the Champions league title. The other clubs e.g. Barcelona and Arsenal are the strong candidate now, if Bayern Munich successfully sign Harry Kane, I would include Bayern Munich to be a strong candidate too. Maybe people will include Real Madrid, but I'm not, they're in the same position when Barcelona lost Messi, Suarez and Neymar, they're in regeneration phase.
Real Madrid is better than Barcelona this season in my opinion. That's why they are great candidates in Spain and UCL. Of course, Manchester City is still the biggest favourite. A team with big trump cards for the Premier League and UCL. Gundogan's departure will not put them in big trouble. Kovacic is a very talented player and can easily fill this gap.