Chelsea will reportedly not let Cesc Fabregas leave the club until they have signed a central midfielder to replace him at Stamford Bridge.
The Spaniard's contract at Chelsea is due to expire at the end of this season, but Monaco will reportedly pay €10m (£9m) in order to secure his services this month.
AC Milan were also interested in Fabregas, while Chelsea had offered him an 18-month contract extension, but Monaco have now won the race for his signature.
However, Calciomercato reports that the Ligue 1 outfit may have to wait a little longer to complete the deal as Chelsea search for a replacement for the 31-year-old.
Fabregas, who is set to sign a five-year contract at Monaco, has made 197 appearances for Chelsea across all competitions since joining them in 2014.