Sarri: Chelsea can become a good team in 2 or 3 months
The former Napoli boss is just about a month into his Chelsea contract, with a new philosophy and training for the first time this week with a full squad.
"I am very happy I can work with all my players for the first time tomorrow [Wednesday]," said Sarri after the Blues' penalty shootout win over Lyon.
"Potentially we can become, in two or three months, a very good team."
Chelsea will play their opening Premier League match away at Huddersfield on Saturday.
When asked if the match came too early, Sarri replied: "Yes I think so, especially for all of them."
Sarri started the Lyon game with a second string side despite it including some of his World Cup stars like Nigeria's Victor Moses, Brazil star Willian and Rube Loftus-cheek of England.
Belgium star Eden Hazard, France duo of Ngolo Kante and Olivier Giroud all came on as a second-half substitute in a game that ended 0-0.
Chelsea won the Lyon friendly on penalties with new signing Robert Green been the hero of the match.
Sarri will be training on Wednesday with a full squad for the first time and he is delighted to have his top players back.
Chelsea are also set to announce the signing of a new goalkeeper Kepa Arrizabalaga from Spanish side Athletic Bilbao.