Former Chelsea boss Maurizio Sarri was introduced to Juventus fans as manager for the first time on Thursday.
The Italian fired a parting shot at Eden Hazard by insisting the Belgian caused issues in defending and made tactical plans tough.
Sarri added that Cristiano Ronaldo will be a step up in class from the players he had at Chelsea.
Speaking to reporters on Thursday, Sarri said: “In recent years, I’ve had 4-3-3, but the 4-3-3 at Chelsea was very different to the one at Napoli.
“We had to accompany Eden Hazard’s characteristics, as he could change the game, but also his presence caused issues in defending that we had to work on.”
“At Chelsea I coached some very strong players, but training Cristiano will be yet another step forward,” he added.
“He had made many records. I’d like to help him break some new records.”
Sarri also described Chelsea players as individualistic compared to Napoli players who were more like a team.
“What changes are the characteristics of the players,” Sarri said. “Napoli had team players, who were totally at the disposal of the team and moved the ball at a decisively quicker pace.
“Chelsea are made up of probably technically superior players, but with different individual characteristics.
“They have wingers who want the ball at their feet and like to go one-on-one. It leads to a less fluid style of football, because Napoli had 11 who could play one-touch football, Chelsea had seven or eight who could do that and the others were individuals who could make the difference going by themselves.”
Sarri lasted just one season at Stamford Bridge, achieving a third-placed finish and steering the Blues to Europa League glory but failing to win over Chelsea fans who remained skeptical of his methods and often baffled by his substitutions and in-game management.