July 1 is the cut-off point for contracts, with players tend to become free agents at this stage.
Chelsea is a particular case as they've only released two senior players for free - N'Golo Kante (who they wanted to keep) and Tiemoue Bakayoko (whose contract was actually until 2024).
Even then, they've already done a lot of business, as Kai Havertz, Mateo Kovacic, Kalidou Koulibaly, Edouard Mendy and Ruben Loftus-Cheek are already departed. A few more players are set to be on their way out as well.
At the same time, the Blues completed two incoming transfers: Christopher Nkunku and Nicolas Jackson have already been confirmed as new Chelsea players.
Here's the full first-team squad at Chelsea on July 1.
Goalkeepers
Kepa Arrizabalaga, Gabriel Slonina, Marcus Bettinelli
Defenders
Wesley Fofana, Benoit Badiashile, Levi Colwill, Trevoh Chalobah, Ethan Ampadu, Malang Sarr, Thiago Silva, Ben Chilwell, Marc Cucurella, Lewis Hall, Baba Rahman, Reece James, Malo Gusto, Cesar Azpilicueta
Midfielders
Enzo Fernandez, Conor Gallagher, Andrey Santos, Carney Chukwuemeka, Mason Mount
Forwards
Raheem Sterling, Mykhailo Mudryk, Christian Pulisic, Callum Hudson-Odoi, Noni Madueke, Hakim Ziyech, Christopher Nkunku, Romelu Lukaku, Nicolas Jackson, Armando Broja, Pierre-Emerick Aubameyang