Chelsea could be about to sign Renato Veiga from FC Basel with the Swiss club allowing him to enter talks with an unnamed club, reports the Evening Standard.
The 20-year-old, who has been capped by Portugal through to under-21 level, is available for around £12m.
A statement from FC Basel read: “Renato Veiga has left the training camp – he is in talks with another club.”
Chelsea have already added Marc Guiu, Kiernan Dewsbury-Hall, Tosin Adarabioyo and Omari Kellyman to their squad.