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.

Thursday Morning Sports Update
Former Liverpool And Blackburn Full-Back Inge Bjornebye Joins Rangers As Football Consultant And Advisor
Lizzy Kent Appointed FAI's New Head Of Women And Girls Football
No Afternoon Session At The PDC World Darts Championship Today
Wednesday Morning Sports Update
Tuesday Morning Sports Update
Niall Kelly Retires From Inter County Football
Boxing Promoter Frank Warren Revealed Potential Fight Between Anthony Joshua And Tyson Fury