Although the Blues came out on top 3-1 against Milan on Wednesday, the Italian thinks there is scope to trim his squad before competitive football begins.
Chelsea head coach Antonio Conte revealed there could be more departures from Stamford Bridge ahead of the new Premier League season.
Oscar scored a second-half double on Wednesday as Chelsea defeated Milan 3-1 in their final match of the International Champions Cup in the United States.
Following the fixture, Conte said he has a clearer idea of what his plans are for his squad leading into the season.
"I think this match told me a lot about the players who we will keep, and who can go on loan or we can sell," the Italian said.
"Today, it was important because I have a clearer idea than before.
"Now we go back to London. It's important for me and for the club to talk and take decisions about all the players.
"In pre-season we worked with 30 players - four goalkeepers and 26 players. There is one game remaining against Werder Bremen and then we must take the decision.
"We hope to take the best decision for the club and the players, too."
Conte also praised match-winner Oscar, who found the net via a penalty and a clinical finish in the second half of the contest against the Serie A side.
"Oscar is an important player. I think the season when Chelsea won the title, he was fantastic," Conte said.
"Last season was bad for all the players, not only for Oscar or for another player, for all.
"I think Oscar is a good player with a great talent and he can improve a lot. I see a good attitude and a good will in him."
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