The Blues smashed the British transfer record to sign Ecuador international midfielder Caicedo from Brighton but he has struggled so far in west London.
Caicedo gave away a penalty on his Chelsea debut as the Blues lost to West Ham and was largely at fault for Nottingham Forest’s goal in their shock 1-0 win at Stamford Bridge on Saturday.
Leboeuf feels that Caicedo, along with fellow midfielder Enzo Fernandez, are struggling with confidence which is making them only ‘do the minimum’.
The Frenchman also admitted that he has been left ‘upset’ by defenders Thiago Silva and Axel Disasi for not taking enough attacking risks.
‘I think it’s a matter of confidence for the Chelsea players but also how you make them play and how you can turn and twist their brain,’ Leboeuf told ESPN.
‘It’s not that they’re not good players, but they don’t know what to do.
‘The only thing they think is, ‘I don’t want to lose the ball’ – which is why we see Enzo Fernandez and Moises Caicedo and some others not taking any risks.
‘They don’t want to be booed and they don’t want to be criticised so they do the minimum. That’s the thing.
‘I was getting a little bit upset with Thiago Silva and Axel Disasi because they don’t take enough risks. They should go [forward] and outnumber [the opposition] but they don’t do that, it’s too simple and it doesn’t work.’