Former Chelsea captain Dennis Wise feels the current squad lack leaders.
Pressure is mounting at Stamford Bridge after just one win in their last five Premier League games has left head coach Antonio Conte's future under question.
"At the moment they seem all over the place and things haven't gone as nicely as they'd expect," Wise told Premier League Daily.
"I look at some of the personnel who have come in and they've found it very difficult to adapt at times to the way of the English Premier League.
"I look at a certain person who went out the door called John Terry, he was a leader of that group and I don't think at the moment they have someone like that who is in there and can sort these problems out.
"I look at Cahill, and I'd like to think he would be a leader, but at the moment he's been struggling as well.
"The players going in, they're not quite sure what they've got to do. You look at Bakayoko the other day, is he going to break forward, is he going to hold? - I don't really know what he does. He's a little bit in between at the moment and he's finding it very very difficult in adapting to the Premier League."