The Belgian has played the last two seasons with Inter Milan.
Romelu Lukaku is set to complete his move from Inter Milan to Chelsea today.
The Belgian striker is to rejoin the London club, this time for 115 million euro.
The 28 year old has scored 64 goals in 95 games for Inter Milan.
Chelsea manager Thomas Tuchel feels the Champions League winners can mount a serious challenge for the Premier League title.

IRFU Investigate Online Racist Abuse Directed Toward Edwin Edogbo
Farrell Hits Out At "Keyboard Warriors" Aiming Abuse At Suncroft's Sam Prendergast And Jack Crowley
Monday Morning Sports Update
Kildare Football Team vs Derry
Tottenham Set To Appoint Igor Tudor As Interim Head Coach
Two League Of Ireland Games Postponed Due To Weather Conditions
ROI Begin Their National League Campaign Away To Kosovo On September 24th
Friday Morning Sports Update