Chelsea have signed French centre-back Wesley Fofana from Leicester City on a seven-year deal.
He was restricted to just seven league games during the 2021-22 campaign after breaking his leg in a pre-season friendly against Villarreal.
"The two last days have been really big for me and I'm very happy," he said.
"I trained this morning with the team and it's a dream for me. I'm very excited to start playing games for the fans and the club.
"I'm here to win trophies - the Champions League, Premier League, FA Cup, Carabao Cup, everything. I came here to win and the club is built to win trophies so I'm here to continue that."
Fofana was part of Brendan Rodgers' starting XI as Leicester won the FA Cup for the first time in their history by beating Chelsea in the 2021 final.
"Gutted to lose him but wish Wesley Fofana well," former Leicester striker Gary Lineker posted on social media.
"Every player wants to play Champions League football so it's understandable.
"Chelsea fans, you've got the most prodigiously talented young central defender in the world. Yes, I believe he's that good."
This summer Chelsea have brought in England forward Raheem Sterling from Manchester City for £50m, Senegal defender Kalidou Koulibaly from Napoli for £34m, English midfielder Carney Chukwuemeka from Aston Villa for £20m, Spain left-back Marc Cucurella from Brighton for £60m and Italian midfielder Cesare Casadei from Inter Milan.
Thomas Tuchel's side are eighth in the Premier League after Tuesday's 2-1 defeat at Southampton, a second loss in their past three games.
Games37Clean sheets7Tackles65Tackle success %71%Interceptions78Clearances120Duels won230Duels lost156More to follow.
