Shakhtar Donetsk midfielder Douglas Costa is a transfer target for Chelsea, according to The Sun.
The Blues are working on a deal that would see the 24-year-old join them this January, with some reports suggesting a £16m bid has already been made.
Jose Mourinho is looking to strengthen his arsenal of attacking midfielders, which includes Brazilian international Willian - a former teammate of Costa's.
On the other side of the spectrum, forward Mohamed Salah is subject to a 18-month loan bid from Roma, who want Chelsea to accept just £380,000 to sign the player until the end of next season.
Meanwhile Kevin De Bruyne's agent has confirmed the German international has no intention of returning to England after a "difficult time at Chelsea."