Chelsea are reportedly in advanced talks to sign Porto winger Christian Atsu.
The Ghana international is in the final year of his contract at the Portuguese club, and he has previously attracted the attention of Tottenham Hotspur.
However, according to Sky Sports News, Chelsea have made their move for the 21-year-old, as they look to strengthen their squad before the end of the transfer window.
Chelsea are expected to complete the signing of Willian later this week after a work permit hearing, while they also retain an interest in Wayne Rooney and Samuel Eto'o.
