Chelsea boss Jose Mourinho has confirmed that defender Filipe Luis will leave the club and will be replaced by a new left-back.
The 29-year-old has struggled to adapt to English football and will return to Atletico Madrid after a very disappointing season at Stamford Bridge.
The Portuguese added that the Blues are only planning to sign players if others leave the club.
"We are a very happy group," Mourinho told a press conference.
"The players feel it. We are a club in peace. We are a club where our future has to be bright.
"At the moment we don't want players. It's simple.
"We must be ready because it looks like the market is open, and because it looks like the market is open there is always a risk somebody comes for one of our players or one of our players shows an interest in leaving. We must be ready to answer to it.
"If somebody speaks about other midfield players, it's not true because I have Ramires, Matic, Fabregas, Mikel, Loftus-Cheek and Oscar.
"But imagine if somebody comes with a bid on 29 August and we are happy with the bid and the player is happy to leave.
"We must be ready. If we speak about new players at the moment we speak about the balance of the squad, which is a balanced squad.
"In this moment we need a left-back because I think we are selling Filipe Luis now or tomorrow.
"We need to go the market, we need to find a club that accepts a bid before 31 August, and we are going for a left-back. In other positions we have no space."