The Argentine's contract expires in the summer, meaning he can join the Premier League champions on a free transfer.
The Blues can turn Radamel Falcao's loan move into a permanent transfer, if they're willing to pay £37.8m.
Football Leaks revealed the terms and conditions of the striker's loan move which includes a £37,844,328.07 clause.
Considering Falcao has scored just once since his Stamford Bridge move, it seems highly unlikely the Blues will take up the offer.