Unfortunately for Chelsea, I think they had a terrible mercato.

Antonio Conte is for sure a fantastic coach but he has terribly handled his team by ostracising Diego Costa the way he did. Selling Matic was another huge mistake, especially because he was sold to a competitor. We already see his impact at Manchester United and how Chelsea midfielder has become less compact. Matic - Kanté - Fabregas was a good Defense/Box-to-box/Offensive midfield, really well balanced.

Diego Costa is being substituted by Batshuayi for the moment but the Belgian is far away from the level Diego has. Morata is coming but I am still not a 100% convinced he will be the top striker the media think he his.

This mercato + a start with CS & 1st game of PL is bad, if they lose today players' trust in Conte wil be lower than ever since he joined the club.