Chelsea star Willian appears to have criticised Maurizio Sarri for holding more afternoon training sessions.
The Brazilian has opened up on the new challenges that has brought to his family life as he sees less of his children.
Sarri took over from Antonio Conte in the summer and has made the adjustment to training at Chelsea.
Willian told The Times: “Of course, I prefer to train in the morning because then you can stay with your family, your daughters, because when I’m training in the afternoon my kids go home and then when I arrive home, they have dinner and go to bed.
“So I see less of my daughters, that’s why I prefer morning training.”
Chelsea boss Sarri has challenged Eden Hazard to become more aggressive to reach his full potential.
“It is easy to stimulate Hazard – as long as you let him have fun,” he told Sky Sports.
“He’s very easy, it didn’t need strategies from me.
“He doesn’t get influenced by the media and what happens around him. As long as he’s having fun and he plays. And he loves playing football.
“But you need important objectives for important players.
“And he can improve if he becomes a little bit more aggressive and gives the best of himself.”
Chelsea boss Sarri has criticised the tactical awareness of Ruben Loftus-Cheek.
“I have seen he is a great player from the technical point of view, from the physical point of view,” said the Italian.
“He has to improve from a tactical point of view. I think he has played a very good match, from the physical point of view and the technical point of view.
“I want more, from the tactical point of view, because we conceded three, four counter-attacks to the opponent.
“We have to do better, especially in these cases, with the mistakes. But I’m sure he will improve.
“I think in this moment for the player it’s better to stay in Cobham [Chelsea’s training ground].
“At the moment for him it’s very important to have a lot of training.
“In the last three, four weeks, he hasn’t been training a lot. I think now it’s better for him to stay to work.”