Boss Jose Mourinho says "two or three" players will join Chelsea during the summer transfer window.
The Portuguese insists that he is happy with his current squad and he has no intention of selling key players as it was the case last summer.
But he also admits that it will be difficult to find the right players ahead of next season.
"We like the players, we are happy with the players," Mourinho said.
"Two or three are always coming to the club, that’s normal. The players I am looking for are my players, the players I want to keep. Last season I had players I wanted to sell.
"The most important thing in the market is not to lose players. How can I find a better striker than Diego Costa? A better midfielder than Matic? A better right-back than Ivanovic?
"Our squad this season was very good. We didn’t have many injuries.
"We had three players play 38 matches of the Premier League. If you come to a champion team you are not a big name. The big names are the champions."