While such tactics brought significant improvement to Napoli and were hailed across the continent, De Laurentiis, who formerly labelled Sarri as a genius, believes he will need to be more flexible in the Premier League and develop a greater winning edge.
Brazil worldwide Willian, who played at the 2018 FIFA World Cup for his country, was due back in England last Friday but did not turn up for pre-season training until Wednesday afternoon as he reportedly had some issues with his passport.
Once upon a time, clubs from the same league would never play each other during pre-season.
Speaking after the defeat to Arsenal, Sarri admitted he wanted some answers from Willian. The Brazilian's tardiness has been attributed to passport issues, but Sarri was unimpressed when asked to comment on his player's late arrival.More news: Fury v Wilder 'nearly done' for December
"I don't know him", he told beIN Sports.
But there was one massive bonus to come out of the match for Chelsea in the form of Callum Hudson-Odoi.
At a club famed for its dominance of academy football and then the difficulty for those young players of actually breaking into the first-team, it was a significant statement that will hopefully also herald a change of approach under Sarri.
'I just want to keep getting chances, hopefully the manager sees that and gives me the opportunity to play and hopefully I keep impressing'.
But Blues boss Sarri has declared that Hudson-Odoi is very much part of his plans after another electrifying pre-season performance.