The Dutchman has outlined why he believes things are going wrong for Chelsea this term.
Gullit told beIN SPORTS: "When you win a title, things change. The opposition is more alert.
"Plus the fact that there's the Champions League. There's a lot of things to play for. You have to divide your team in a manner that a lot of players can play.
"Chelsea also had a lot of problems [over the summer]… I think they sold some good players - [Nemanja] Matic, [Diego] Costa - and it has been difficult to replace them."