The Blues fell ten points behind Manchester City with a loss to Wolves last night.
Initial success under Mourinho and Conte dithered when the players seemingly lost faith in their systems. And Di Canio thinks Sarri must be wary of falling into the same trap.
The former Sunderland boss told Sky Sports (via calciomercato): "Chelsea? The opposite would have been better: a slow start and continuous growth. Now the path has almost stopped and there is an involution. For players like Hazard and Willian, it is also difficult to pass the opponent. There are many games in this period and the other teams do not give up anything. Sarri will have to be careful.
"On Saturday there is City and Chelsea will face them after a defeat. You can lose against City, but if there is another defeat, they might find themselves fifth. The risk is that many players feel the backlash and do not believe in the growth process. Many of these players are the same ones who had given up on Mourinho and Conte.
"They have no reason to give up the championship with Sarri because I see that they love him and follow him. However, I repeat that Sarri must clarify some points in the tactical and technical process because those up front hold the ball too much for his way of thinking about football."