Chelsea announced Morgan Rogers from Aston Villa for £117m on 21 July, followed by Maxence Lacroix from Crystal Palace for £52m on 30 July.
A signing counts when Chelsea FC officially announces a completed permanent transfer on chelseafc.com; fees are per BBC Sport or Sky Sports at announcement, add-ons excluded.
None of Chelsea's last seven head coaches started a third season. We looked at every permanent coach since José Mourinho's second spell ended in 2015. Four of the seven won a trophy, and it did not change the result. The five most recent are below.