Chelsea announced the signing of goalkeeper Mike Penders on Tuesday, bringing their tally for players brought in this summer to 12.
Penders, 19, joins for a reported €20 million ($22.3m) from Genk in the Belgian Pro League, and will return to the club on loan to continue his development.
The Belgium under-19 international has made two senior appearances for Genk, the first of which came against Standard Liege in July.
Penders follows Pedro Neto, Tosin Adarabioyo, Kiernan Dewsbury-Hall, Filip Jörgensen, Omari Kellyman, Aaron Anselmino, Caleb Wiley, Renato Veiga, Marc Guiu and João Félix in arriving at the west London club, with Estêvão Willian having agreed to join the club in 2025.
Chelsea already have five goalkeepers listed in their first team: Robert Sánchez, Lucas Bergstrom, Jörgensen, Djordje Petrovic and Marcus Bettinelli.