3. Thorgan Hazard
If Eden does end up leaving London, who other to replace him with other than his brother Thorgan Hazard who has been on fire for Borussia Monchengladbach as he has helped them to get to second place in the league only behind a rampant Borussia Dortmund.
He has registered nine goals and nine assists in 19 appearances for the German club and he has been integral to the squad and will surely be a great addition to Chelsea to replace his brother if he does end up leaving the club.
With his market value at €38 million, Chelsea will be demanded more than that if Gladbach end up in the Champions League places but it would surely be money well spent as he is capable of filling his brother's shoes at the Stamford Bridge if he does end up moving to London.