Who has been Chelsea’s best signing in the last five years?

Chelsea are pushing for a top-four finish in the Premier League this season and are also seeking UEFA Europa League glory.

Maurizio Sarri’s side is filled with world class players and the Blues are one of the most active teams in the transfer market.

However, the Blues have been handed a transfer ban and will now need to use some of their academy products.

The London club have made some big signings in the last five years, but who do you think has been the best acquisition? 

Let us know in our ‘winner-stays-on’ style poll below.