It was a crazy transfer window all around, and Chelsea were busy making deals until the last minutes of the deadline day, confirming the arrival of Saul already after the window slammed shut.
Here's all the business made by the Blues in the last months (all the fees as per Transfermarkt).
Incomings
Romelu Lukaku from Inter - £103.5m
Saul Níguez from Atletico Madrid - £4.5m (loan fee)
Marcus Bettinelli from Fulham - free transfer
Outgoings
Tammy Abraham to AS Roma - £36m
Kurt Zouma to West Ham - £31.5m
Fikayo Tomori to AC Milan - £26.28m
Marc Guehi to Crystal Palace - £21m
Davide Zappacosta to Atalanta - £8.1m
Valentino Livramento to Southampton - £5.31m
Victor Moses to Spartak Moscow - £4.5m
Dynel Simeu to Southampton - £1.58m
Lewis Bate to Leeds - £1.58m
Myles Peart-Harris to Brentford - £1.35m
Pierre Ekwah to West Ham - £1.26m
Olivier Giroud to AC Milan - £900k
Marco van Ginkel to PSV Eindhoven - free transfer
Danilo Pantic to Partizan - free transfer
Izzy Brown to Preston - free transfer
Jack Wakely to Wycombe - free transfer
Luke McCormick to AFC Wimbledon - free transfer
Jon Russell to Huddersfield - free transfer
Marcel Lewis to Union SG - free transfer
Players loaned out
Tiemoue Bakayoko to AC Milan (loan fee: £1.80m)
Kenedy to Flamengo (loan fee: £450k)
Emerson to Olympique Lyon (loan fee: £450k)
Michy Batshuayi to Besiktas (loan fee: £135k)
Ethan Ampadu to Venezia
Danny Drinkwater to Reading
Abdul-Rahman Baba to Reading
Matt Miazga to Alaves
Jake Clarke-Salter to Coventry
Billy Gilmour to Norwich
Juan Familia-Castillo to Birmingham
Levi Colwill to Huddersfield
Henry Lawrence to AFC Wimbledon
Jamie Cumming to Gillingham FC
Ian Maatsen to Coventry
Conor Gallagher to Crystal Palace
Armando Broja to Southampton
Karlo Ziger to Rudar Velenje
Dujon Sterling to Blackpool
Thierno Ballo to Rapid Vienna
Nathan Baxter to Hull City
Players released before 2021/22
Jamal Blackman
Willy Caballero