The club gave him prior permission to return late, but new manager Sarri, speaking after a penalty-shoot-out defeat to Arsenal in the International Champions Cup, was clearly frustrated by the issue.
The controversial Italian head coach made Italy worldwide Jorginho his first summer signing in a £57m deal from Serie A runners up Napoli to improve Chelsea FC's midfield. An expired passport was reportedly behind Willian's delayed return to London, though Sarri conceded he found the situation "strange".
The player is said to have contacted the club and is believed to be relaxed about the situation.
"I don't know him", he told beIN SPORTS.
He added: "In this moment I can't comment on it".
Asked for an update on the trio, Sarri replied: "Not at this moment, no, because I will see them on Saturday for the first time". There is no news.
Kalidou Koulibaly and Dries Mertens were among the other players linked with treading that same path, though it seems that a written contract clause prevented the FA Cup holders from prising away more of Carlo Ancelotti's top talents.
'He has a fantastic team, fantastic players and squad - I think he has conditions to do good work'.