Spanish midfielder Cesc Fabregas has completed his move to French team AS Monaco from Chelsea, the two clubs announced on Friday.
The 31-year-old, who played for Arsenal from 2003-11 and Chelsea from 2014, won the World Cup with Spain in 2010 and the European Championship in 2008 and 2012.
"Cesc Fabregas has today completed a permanent transfer to Monaco," English Premier League Chelsea said on their website as Monaco confirmed he had signed with them until June, 2022.
Fabregas posted a statement on twitter, saying: "It's with mixed emotions that I am writing this message.
"To everyone at Chelsea Football Club. The owner Mr Abramovich who brought me here, to my teammates who helped me win so many trophies, to the staff who made my time here so easy and to all you fans who made me feel so special week in week out.
"It has been an incredible journey and it is with great sadness that I must say goodbye. I will miss you all and wish you the best of luck for the future."
Fabregas won two league titles with Chelsea and one Spanish La Liga crown during his 2011-14 stint at Barcelona.
"We thank Cesc for his wonderful service and wish him the very best of luck for the next chapter in what has been a fantastic career," Chelsea said in a statement.
Fabregas scored 22 goals for the London club in 198 appearances.
Fabregas will be required to make an immediate impact for former Arsenal teammate Thierry Henry's men, who languish second from bottom of the Ligue 1 table and face the threat of relegation.