Chelsea have signed defender Marcos Alonso from Fiorentina.
Alonso has joined Antonio Conte's side on a five-year contract for a fee Sky sources believe to be £24m.
Alonso told Chelsea's club website: "I'm very happy. It's a step up in my career and I think this is the perfect place for me to continue developing. It's time for me to win some titles.
"It was an easy decision for me to make when I heard the club were interested in signing me.
"My family and close friends know Chelsea is the club I have dreamed about playing for so I'm really excited about the challenge and I'm looking forward to working with my new team-mates."
The 25-year-old will now have his third stint in the Premier League, having played for Bolton between 2010 and 2013 and spending a six-month loan spell with Sunderland in 2014.
Alonso, who came through the Real Madrid academy and has represented Spain at U19 level, made 75 appearances in all competitions for Fiorentina in two seasons with the club, helping the Italian side to a fifth-place finish in Serie A last campaign.