The 60-year-old impressed during the opening months of his time in west London and Chelsea remained unbeaten in the Premier League until late November.
However, Sarri has since regularly criticised his squad’s mentality and the players are understood to feel burdened by the level of information he forces on them before matches.
Chelsea have shown signs that they’re adapting to Sarri with back-to-back wins in London derbies in the last week and Mourinho says supporters should stick by him as his philosophy takes hold at the club.
‘Italy is not an easy country,” he told beIN Sports.
‘You learn how to deal with the press; it is very specialised, they have top commentators [with] great experience in football, the journalists are also very clever in using the emotion of football in Italy.
‘Maurizio comes to England with more than 20 years of experience in football. I think he’s ready, the main difficulty is imposing his style of play which is the way he always played with Napoli.
‘The Premier League is the [league] where you sometimes have to lose your identity a bit to adapt to the characteristics of the game and the opponents.
‘He will learn in time, the second season will be better for him.’