Chelsea have splashed cash for the Spanish defender with Duffy loaned to Fulham.
Chelsea have completed the signing of defender Marc Cucurella from Brighton.
The south coast side will receive a club record fee for the Spanish defender, who spent just one season with Graham Potter's side.
Chelsea boss Thomas Tuchel explains why he was so keen to complete the deal:
Also departing Brighton today is Republic of Ireland defender, Shane Duffy.
Newly promoted Fulham will be Duffy's home for the coming season.
Leicester manager Brendan Rodgers says the club has no intention of selling Wesley Fofana and James Maddison.
The pair have been subject to interest from Chelsea and Newcastle respectively.
Rodgers has made his message clear:
Westmeath Family Into Final Of Ireland's Fittest Family
Athlone Town Learn Fixtures For New League Of Ireland Season
Isabel Ryan And Alexis Stickland To Continue With Athlone Town In 2026
Our Defending Starts From 1 to 15 - Kirsten Keenan
Sallins Prove Too Strong For Tubberclair In Leinster Decider
Portlaoise Panthers Suffer Defeat In Women's Super League
Leinster Overcome Leicester Tigers With Strong Second Half Performance
Medals Secured For Ireland At European Cross Country Championships
All Ireland Glory Achieved By Camross
Dublin Lions End Portlaoise Panthers' Perfect Home Record
Success For Camross But Heartbreak For Tubberclair
Portlaoise Panthers Back In Super League Action This Weekend
Camross Name Tomas Burke As New Hurling Manager
Midlands Stars Set For European Cross Country Championships
Laois U20 Hurler And Footballer Of The Year Revealed
Camross Has Nothing To Lose This Weekend - Arien Delaney
Robbie Henshaw Named To Start For Leinster's Champions Cup Clash
Leinster Glory The Target For Tubberclair This Weekend
Portlaoise Panthers Aiming To End Losing Streak
Camross Getting Set For All Ireland Final